diff --git a/README.md b/README.md
index 31c6ea1..cd545ce 100755
--- a/README.md
+++ b/README.md
@@ -136,35 +136,35 @@ Iodine.setErrorMessages({ same: `Champ doit être '[PARAM]'` }); // French
 
 The following validation rules are available:
 
-| Rule                  		| Description                                                                     |
+| Rule                          | Description                                                                     |
 | ----------------------------- | ------------------------------------------------------------------------------- |
-| isAfter(date/integer) 		| Verify that the item is a `Date` after a given `Date` or timestamp
-| isAfterOrEqual(date/integer) 	| Verify that the item is a `Date` after or equal to a given `Date` or timestamp
-| isArray 						| Verify that the item is an `array`
-| isBefore(date/integer) 		| Verify that the item is a `Date` before a given `Date` or timestamp
+| isAfter(date/integer)         | Verify that the item is a `Date` after a given `Date` or timestamp
+| isAfterOrEqual(date/integer)     | Verify that the item is a `Date` after or equal to a given `Date` or timestamp
+| isArray                         | Verify that the item is an `array`
+| isBefore(date/integer)         | Verify that the item is a `Date` before a given `Date` or timestamp
 | isBeforeOrEqual(date/integer) | Verify that the item is a `Date` before or equal to a given `Date` or timestamp
-| isBoolean             		| Verify that the item is either `true` or `false`
-| isDate                		| Verify that the item is a `Date` object
-| isDifferent(value)       		| Verify that the item is different to the supplied value (uses loose compare)
-| isEndingWith(value)      		| Verify that the item ends with the given value
-| isEmail                		| Verify that the item is a valid email address
-| isFalsy               		| Verify that the item is either `false`, `'false'`, `0` or `'0'`
-| isIn(array)           		| Verify that the item is within the given `array`
-| isInteger             		| Verify that the item is an `integer`
-| isJson             			| Verify that the item is a parsable JSON object `string`
-| isMaximum(limit)      		| Verify that the item does not exceed the given limit (number or char length)
-| isMinimum(limit)      		| Verify that the item is not under the given limit (number or char length)
-| isNotIn(array)           		| Verify that the item is not within the given `array`
-| isNumeric             		| Verify that the item is `number` or a numeric `string`
-| isOptional            		| Allow for optional values (only for use with multiple checks)
-| isRegexMatch(exp)        		| Verify that the item satisifies the given regular expression
-| isRequired            		| Verify that the item is not `null`, `undefined` or an empty `string`
-| isSame(value)       			| Verify that the item is the same as the supplied value (uses loose compare)
-| isStartingWith(value)    		| Verify that the item starts with the given value
-| isString              		| Verify that the item is a `string`
-| isTruthy              		| Verify that the item is either `true`, `'true'`, `1` or `'1'`
-| isUrl                			| Verify that the item is a valid URL
-| isUuid                		| Verify that the item is a `UUID`
+| isBoolean                     | Verify that the item is either `true` or `false`
+| isDate                        | Verify that the item is a `Date` object
+| isDifferent(value)               | Verify that the item is different to the supplied value (uses loose compare)
+| isEndingWith(value)              | Verify that the item ends with the given value
+| isEmail                        | Verify that the item is a valid email address
+| isFalsy                       | Verify that the item is either `false`, `'false'`, `0` or `'0'`
+| isIn(array)                   | Verify that the item is within the given `array`
+| isInteger                     | Verify that the item is an `integer`
+| isJson                         | Verify that the item is a parsable JSON object `string`
+| isMaximum(limit)              | Verify that the item does not exceed the given limit (number or char length)
+| isMinimum(limit)              | Verify that the item is not under the given limit (number or char length)
+| isNotIn(array)                   | Verify that the item is not within the given `array`
+| isNumeric                     | Verify that the item is `number` or a numeric `string`
+| isOptional                    | Allow for optional values (only for use with multiple checks)
+| isRegexMatch(exp)                | Verify that the item satisifies the given regular expression
+| isRequired                    | Verify that the item is not `null`, `undefined` or an empty `string`
+| isSame(value)                   | Verify that the item is the same as the supplied value (uses loose compare)
+| isStartingWith(value)            | Verify that the item starts with the given value
+| isString                      | Verify that the item is a `string`
+| isTruthy                      | Verify that the item is either `true`, `'true'`, `1` or `'1'`
+| isUrl                            | Verify that the item is a valid URL
+| isUuid                        | Verify that the item is a `UUID`
 
 Examine the tests for examples of how to use each rule.
 
diff --git a/dist/iodine.min.js.map b/dist/iodine.min.js.map
index 132917b..05fb6f2 100644
--- a/dist/iodine.min.js.map
+++ b/dist/iodine.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"iodine.min.js","sources":["../src/iodine.js"],"sourcesContent":["/*\n|--------------------------------------------------------------------------\n| Iodine - JavaScript Library\n|--------------------------------------------------------------------------\n|\n| This library contains a collection of useful validation rules that can\n| be used to quickly verify whether items meet certain conditions.\n|\n*/\nclass Iodine\n{\n\n\t/**\n\t * Constructor.\n\t *\n\t **/\n\tconstructor()\n\t{\n\t\tthis.messages = this._defaultMessages();\n\t}\n\n\n\n\t/**\n\t * @internal.\n\t *\n\t **/\n\t_dateCompare(first, second, type, equals = false)\n\t{\n\t\tif (! this.isDate(first)) return false;\n\n\t\tif (! this.isDate(second) && ! this.isInteger(second)) return false;\n\n\t\tsecond = typeof second === 'number' ? second : second.getTime();\n\n\t\tif (type === 'less' && equals) return first.getTime() <= second;\n\t\tif (type === 'less' && ! equals) return first.getTime() < second;\n\t\tif (type === 'more' && equals) return first.getTime() >= second;\n\t\tif (type === 'more' && ! equals) return first.getTime() > second;\n\t}\n\n\n\n\t/**\n\t * @internal.\n\t *\n\t **/\n\t_defaultMessages()\n\t{\n\t\treturn {\n\t\t\tafter         : `The date must be after: '[PARAM]'`,\n\t\t\tafterOrEqual  : `The date must be after or equal to: '[PARAM]'`,\n\t\t\tarray         : `Value must be an array`,\n\t\t\tbefore        : `The date must be before: '[PARAM]'`,\n\t\t\tbeforeOrEqual : `The date must be before or equal to: '[PARAM]'`,\n\t\t\tboolean       : `Value must be true or false`,\n\t\t\tdate          : `Value must be a date`,\n\t\t\tdifferent     : `Value must be different to '[PARAM]'`,\n\t\t\tendingWith    : `Value must end with '[PARAM]'`,\n\t\t\temail         : `Value must be a valid email address`,\n\t\t\tfalsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,\n\t\t\tin     \t\t  : `Value must be one of the following options: [PARAM]`,\n\t\t\tinteger       : `Value must be an integer`,\n\t\t\tjson          : `Value must be a parsable JSON object string`,\n\t\t\tmaximum       : `Value must not be greater than '[PARAM]' in size or character length`,\n\t\t\tminimum       : `Value must not be less than '[PARAM]' in size or character length`,\n\t\t\tnotIn         : `Value must not be one of the following options: [PARAM]`,\n\t\t\tnumeric       : `Value must be numeric`,\n\t\t\toptional      : `Value is optional`,\n\t\t\tregexMatch    : `Value must satisify the regular expression: [PARAM]`,\n\t\t\trequired      : `Value must be present`,\n\t\t\tsame          : `Value must be '[PARAM]'`,\n\t\t\tstartingWith  : `Value must start with '[PARAM]'`,\n\t\t\tstring        : `Value must be a string`,\n\t\t\ttruthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,\n\t\t\turl           : `Value must be a valid url`,\n\t\t\tuuid          : `Value must be a valid UUID`,\n\t\t};\n\t}\n\n\n\n\t/**\n\t * Attach a custom validation rule to the library.\n\t *\n\t **/\n\taddRule(name, closure)\n\t{\n\t\tIodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;\n\t}\n\n\n\n\t/**\n\t * Retrieve an error message for the given rule.\n\t *\n\t **/\n\tgetErrorMessage(rule, arg = undefined)\n\t{\n\t\tlet key   = rule.split(':')[0];\n\t\tlet param = arg || rule.split(':')[1];\n\n\t\tif (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {\n\t\t\tparam = new Date(parseInt(param)).toLocaleTimeString(undefined, {\n\t\t\t\tyear: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'\n\t\t\t});\n\t\t}\n\n\t\treturn [null, undefined].includes(param)\n\t\t\t ? this.messages[key]\n\t\t\t : this.messages[key].replace(\"[PARAM]\", param);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is after another given date.\n\t *\n\t **/\n\tisAfter(value, after)\n\t{\n\t\treturn this._dateCompare(value, after, 'more', false);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is after or equal to another given date.\n\t *\n\t **/\n\tisAfterOrEqual(value, after)\n\t{\n\t\treturn this._dateCompare(value, after, 'more', true);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is an array.\n\t *\n\t **/\n\tisArray(value)\n\t{\n\t\treturn Array.isArray(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is before another given date.\n\t *\n\t **/\n\tisBefore(value, before)\n\t{\n\t\treturn this._dateCompare(value, before, 'less', false);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is before or equal to another given date.\n\t *\n\t **/\n\tisBeforeOrEqual(value, before)\n\t{\n\t\treturn this._dateCompare(value, before, 'less', true);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a boolean.\n\t *\n\t **/\n\tisBoolean(value)\n\t{\n\t\treturn [true, false].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a date object.\n\t *\n\t **/\n\tisDate(value)\n\t{\n\t\treturn value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is different to another given value.\n\t *\n\t **/\n\tisDifferent(value, different)\n\t{\n\t\treturn value != different;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value ends with another given value.\n\t *\n\t **/\n\tisEndingWith(value, sub)\n\t{\n\t\treturn this.isString(value) && value.endsWith(sub);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid email address.\n\t *\n\t **/\n\tisEmail(value)\n\t{\n\t\treturn new RegExp('^\\\\S+@\\\\S+[\\\\.][0-9a-z]+$').test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is falsy.\n\t *\n\t **/\n\tisFalsy(value)\n\t{\n\t\treturn [0, '0', false, 'false'].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is within the given array of options.\n\t *\n\t **/\n\tisIn(value, options)\n\t{\n\t\toptions = typeof options === 'string'\n\t\t\t\t? options.split(\",\")\n\t\t\t\t: options;\n\n\t\treturn options.includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is an integer.\n\t *\n\t **/\n\tisInteger(value)\n\t{\n\t\treturn Number.isInteger(value) && parseInt(value).toString() === value.toString();\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a JSON string.\n\t *\n\t **/\n\tisJson(value)\n\t{\n\t\ttry {\n        \treturn typeof JSON.parse(value) === 'object';\n\t\t} catch (e) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\n\n\t/**\n\t * Determine if the given value meets the given maximum limit.\n\t *\n\t **/\n\tisMaximum(value, limit)\n\t{\n\t\tvalue = typeof value === 'string' ? value.length : value;\n\n\t\treturn parseFloat(value) <= limit;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value meets the given minimum limit.\n\t *\n\t **/\n\tisMinimum(value, limit)\n\t{\n\t\tvalue = typeof value === 'string' ? value.length : value;\n\n\t\treturn parseFloat(value) >= limit;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is not within the given array of options.\n\t *\n\t **/\n\tisNotIn(value, options)\n\t{\n\t\treturn ! this.isIn(value, options);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is numeric (an integer or a float).\n\t *\n\t **/\n\tisNumeric(value)\n\t{\n\t\treturn ! isNaN(parseFloat(value)) && isFinite(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is optional.\n\t *\n\t **/\n\tisOptional(value)\n\t{\n\t\treturn [null, undefined, ''].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value satisifies the given regular expression.\n\t *\n\t **/\n\tisRegexMatch(value, expression)\n\t{\n\t\treturn new RegExp(expression).test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is present.\n\t *\n\t **/\n\tisRequired(value)\n\t{\n\t\treturn ! this.isOptional(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is the same as another given value.\n\t *\n\t **/\n\tisSame(value, same)\n\t{\n\t\treturn value == same;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value starts with another given value.\n\t *\n\t **/\n\tisStartingWith(value, sub)\n\t{\n\t\treturn this.isString(value) && value.startsWith(sub);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a string.\n\t *\n\t **/\n\tisString(value)\n\t{\n\t\treturn typeof value === 'string';\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is truthy.\n\t *\n\t **/\n\tisTruthy(value)\n\t{\n\t\treturn [1, '1', true, 'true'].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid URL.\n\t *\n\t **/\n\tisUrl(value)\n\t{\n\t\treturn new RegExp('^(https?:\\\\/\\\\/)?((([a-z\\\\d]([a-z\\\\d-]*[a-z\\\\d])*)\\\\.)+[a-z]{2,}|((\\\\d{1,3}\\\\.){3}\\\\d{1,3}))(\\\\:\\\\d+)?(\\\\/[-a-z\\\\d%_.~+]*)*(\\\\?[;&a-z\\\\d%_.~+=-]*)?(\\\\#[-a-z\\\\d_]*)?$')\n\t\t\t .test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid UUID.\n\t *\n\t **/\n\tisUuid(value)\n\t{\n\t\treturn new RegExp('^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$')\n\t\t\t .test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine whether the given value meets the given rules.\n\t *\n\t **/\n\tis(value, rules = [])\n\t{\n\t\t// Check if no rules were specified\n\t\tif (! rules.length) return true;\n\n\t\t// Check for an optional value\n\t\tif (rules[0] === 'optional' && this.isOptional(value)) return true;\n\n\t\t// Iterate through the rules\n\t\tfor (let index in rules) {\n\n\t\t\t// Ignore optional rules\n\t\t\tif (rules[index] === 'optional') continue;\n\n\t\t\t// Determine the method to use\n\t\t\tlet rule = rules[index].split(':')[0][0].toUpperCase()\n\t\t\t\t\t + rules[index].split(':')[0].slice(1);\n\n\t\t\t// Validate the value against the method\n\t\t\tlet result = this[`is${rule}`].apply(this, [value, rules[index].split(':')[1]]);\n\n\t\t\t// Check if the value failed validation\n\t\t\tif (! result) return rules[index];\n\n\t\t}\n\n\t\t// Otherwise, the value is valid\n\t\treturn true;\n\t}\n\n\n\n\t/**\n\t * Replace the default error messages with a new set.\n\t *\n\t **/\n\tsetErrorMessages(messages)\n\t{\n\t\tthis.messages = messages;\n\t}\n\n}\n\n\n\n/**\n * Create an instance of the library.\n *\n **/\nwindow.Iodine = new 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+{"version":3,"file":"iodine.min.js","sources":["../src/iodine.js"],"sourcesContent":["/*\n|--------------------------------------------------------------------------\n| Iodine - JavaScript Library\n|--------------------------------------------------------------------------\n|\n| This library contains a collection of useful validation rules that can\n| be used to quickly verify whether items meet certain conditions.\n|\n*/\nclass Iodine\n{\n\n    /**\n     * Constructor.\n     *\n     **/\n    constructor()\n    {\n        this.messages = this._defaultMessages();\n    }\n\n\n\n    /**\n     * @internal.\n     *\n     **/\n    _dateCompare(first, second, type, equals = false)\n    {\n        if (! this.isDate(first)) return false;\n\n        if (! this.isDate(second) && ! this.isInteger(second)) return false;\n\n        second = typeof second === 'number' ? second : second.getTime();\n\n        if (type === 'less' && equals) return first.getTime() <= second;\n        if (type === 'less' && ! equals) return first.getTime() < second;\n        if (type === 'more' && equals) return first.getTime() >= second;\n        if (type === 'more' && ! equals) return first.getTime() > second;\n    }\n\n\n\n    /**\n     * @internal.\n     *\n     **/\n    _defaultMessages()\n    {\n        return {\n            after         : `The date must be after: '[PARAM]'`,\n            afterOrEqual  : `The date must be after or equal to: '[PARAM]'`,\n            array         : `Value must be an array`,\n            before        : `The date must be before: '[PARAM]'`,\n            beforeOrEqual : `The date must be before or equal to: '[PARAM]'`,\n            boolean       : `Value must be true or false`,\n            date          : `Value must be a date`,\n            different     : `Value must be different to '[PARAM]'`,\n            endingWith    : `Value must end with '[PARAM]'`,\n            email         : `Value must be a valid email address`,\n            falsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,\n            in               : `Value must be one of the following options: [PARAM]`,\n            integer       : `Value must be an integer`,\n            json          : `Value must be a parsable JSON object string`,\n            maximum       : `Value must not be greater than '[PARAM]' in size or character length`,\n            minimum       : `Value must not be less than '[PARAM]' in size or character length`,\n            notIn         : `Value must not be one of the following options: [PARAM]`,\n            numeric       : `Value must be numeric`,\n            optional      : `Value is optional`,\n            regexMatch    : `Value must satisify the regular expression: [PARAM]`,\n            required      : `Value must be present`,\n            same          : `Value must be '[PARAM]'`,\n            startingWith  : `Value must start with '[PARAM]'`,\n            string        : `Value must be a string`,\n            truthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,\n            url           : `Value must be a valid url`,\n            uuid          : `Value must be a valid UUID`,\n        };\n    }\n\n\n\n    /**\n     * Attach a custom validation rule to the library.\n     *\n     **/\n    addRule(name, closure)\n    {\n        Iodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;\n    }\n\n\n\n    /**\n     * Retrieve an error message for the given rule.\n     *\n     **/\n    getErrorMessage(rule, arg = undefined)\n    {\n        let key   = rule.split(':')[0];\n        let param = arg || rule.split(':')[1];\n\n        if (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {\n            param = new Date(parseInt(param)).toLocaleTimeString(undefined, {\n                year: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'\n            });\n        }\n\n        return [null, undefined].includes(param)\n             ? this.messages[key]\n             : this.messages[key].replace('[PARAM]', param);\n    }\n\n\n\n    /**\n     * Determine if the given date is after another given date.\n     *\n     **/\n    isAfter(value, after)\n    {\n        return this._dateCompare(value, after, 'more', false);\n    }\n\n\n\n    /**\n     * Determine if the given date is after or equal to another given date.\n     *\n     **/\n    isAfterOrEqual(value, after)\n    {\n        return this._dateCompare(value, after, 'more', true);\n    }\n\n\n\n    /**\n     * Determine if the given value is an array.\n     *\n     **/\n    isArray(value)\n    {\n        return Array.isArray(value);\n    }\n\n\n\n    /**\n     * Determine if the given date is before another given date.\n     *\n     **/\n    isBefore(value, before)\n    {\n        return this._dateCompare(value, before, 'less', false);\n    }\n\n\n\n    /**\n     * Determine if the given date is before or equal to another given date.\n     *\n     **/\n    isBeforeOrEqual(value, before)\n    {\n        return this._dateCompare(value, before, 'less', true);\n    }\n\n\n\n    /**\n     * Determine if the given value is a boolean.\n     *\n     **/\n    isBoolean(value)\n    {\n        return [true, false].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is a date object.\n     *\n     **/\n    isDate(value)\n    {\n        return value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is different to another given value.\n     *\n     **/\n    isDifferent(value, different)\n    {\n        return value != different;\n    }\n\n\n\n    /**\n     * Determine if the given value ends with another given value.\n     *\n     **/\n    isEndingWith(value, sub)\n    {\n        return this.isString(value) && value.endsWith(sub);\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid email address.\n     *\n     **/\n    isEmail(value)\n    {\n        return new RegExp('^\\\\S+@\\\\S+[\\\\.][0-9a-z]+$').test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is falsy.\n     *\n     **/\n    isFalsy(value)\n    {\n        return [0, '0', false, 'false'].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is within the given array of options.\n     *\n     **/\n    isIn(value, options)\n    {\n        options = typeof options === 'string'\n                ? options.split(',')\n                : options;\n\n        return options.includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is an integer.\n     *\n     **/\n    isInteger(value)\n    {\n        return Number.isInteger(value) && parseInt(value).toString() === value.toString();\n    }\n\n\n\n    /**\n     * Determine if the given value is a JSON string.\n     *\n     **/\n    isJson(value)\n    {\n        try {\n            return typeof JSON.parse(value) === 'object';\n        } catch (e) {\n            return false;\n        }\n    }\n\n\n\n    /**\n     * Determine if the given value meets the given maximum limit.\n     *\n     **/\n    isMaximum(value, limit)\n    {\n        value = typeof value === 'string' ? value.length : value;\n\n        return parseFloat(value) <= limit;\n    }\n\n\n\n    /**\n     * Determine if the given value meets the given minimum limit.\n     *\n     **/\n    isMinimum(value, limit)\n    {\n        value = typeof value === 'string' ? value.length : value;\n\n        return parseFloat(value) >= limit;\n    }\n\n\n\n    /**\n     * Determine if the given value is not within the given array of options.\n     *\n     **/\n    isNotIn(value, options)\n    {\n        return ! this.isIn(value, options);\n    }\n\n\n\n    /**\n     * Determine if the given value is numeric (an integer or a float).\n     *\n     **/\n    isNumeric(value)\n    {\n        return ! isNaN(parseFloat(value)) && isFinite(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is optional.\n     *\n     **/\n    isOptional(value)\n    {\n        return [null, undefined, ''].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value satisifies the given regular expression.\n     *\n     **/\n    isRegexMatch(value, expression)\n    {\n        return new RegExp(expression).test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is present.\n     *\n     **/\n    isRequired(value)\n    {\n        return ! this.isOptional(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is the same as another given value.\n     *\n     **/\n    isSame(value, same)\n    {\n        return value == same;\n    }\n\n\n\n    /**\n     * Determine if the given value starts with another given value.\n     *\n     **/\n    isStartingWith(value, sub)\n    {\n        return this.isString(value) && value.startsWith(sub);\n    }\n\n\n\n    /**\n     * Determine if the given value is a string.\n     *\n     **/\n    isString(value)\n    {\n        return typeof value === 'string';\n    }\n\n\n\n    /**\n     * Determine if the given value is truthy.\n     *\n     **/\n    isTruthy(value)\n    {\n        return [1, '1', true, 'true'].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid URL.\n     *\n     **/\n    isUrl(value)\n    {\n        return new RegExp('^(https?:\\\\/\\\\/)?((([a-z\\\\d]([a-z\\\\d-]*[a-z\\\\d])*)\\\\.)+[a-z]{2,}|((\\\\d{1,3}\\\\.){3}\\\\d{1,3}))(\\\\:\\\\d+)?(\\\\/[-a-z\\\\d%_.~+]*)*(\\\\?[;&a-z\\\\d%_.~+=-]*)?(\\\\#[-a-z\\\\d_]*)?$')\n             .test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid UUID.\n     *\n     **/\n    isUuid(value)\n    {\n        return new RegExp('^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$')\n             .test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine whether the given value meets the given rules.\n     *\n     **/\n    is(value, rules = [])\n    {\n        if (! rules.length) return true;\n\n        if (rules[0] === 'optional' && this.isOptional(value)) return true;\n\n        for (let index in rules) {\n\n            if (rules[index] === 'optional') continue;\n\n            let rule = rules[index].split(':')[0][0].toUpperCase()\n                     + rules[index].split(':')[0].slice(1);\n\n            let result = this[`is${rule}`].apply(this, [value, rules[index].split(':')[1]]);\n\n            if (! result) return rules[index];\n\n        }\n\n        return true;\n    }\n\n\n\n    /**\n     * Replace the default error messages with a new set.\n     *\n     **/\n    setErrorMessages(messages)\n    {\n        this.messages = messages;\n    }\n\n}\n\n\n\n/**\n * Create an instance of the library.\n *\n **/\nwindow.Iodine = new 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diff --git a/dist/iodine.min.mjs.map b/dist/iodine.min.mjs.map
index 6adcd78..1eaa715 100644
--- a/dist/iodine.min.mjs.map
+++ b/dist/iodine.min.mjs.map
@@ -1 +1 @@
-{"version":3,"file":"iodine.min.mjs","sources":["../src/iodine.js"],"sourcesContent":["/*\n|--------------------------------------------------------------------------\n| Iodine - JavaScript Library\n|--------------------------------------------------------------------------\n|\n| This library contains a collection of useful validation rules that can\n| be used to quickly verify whether items meet certain conditions.\n|\n*/\nclass Iodine\n{\n\n\t/**\n\t * Constructor.\n\t *\n\t **/\n\tconstructor()\n\t{\n\t\tthis.messages = this._defaultMessages();\n\t}\n\n\n\n\t/**\n\t * @internal.\n\t *\n\t **/\n\t_dateCompare(first, second, type, equals = false)\n\t{\n\t\tif (! this.isDate(first)) return false;\n\n\t\tif (! this.isDate(second) && ! this.isInteger(second)) return false;\n\n\t\tsecond = typeof second === 'number' ? second : second.getTime();\n\n\t\tif (type === 'less' && equals) return first.getTime() <= second;\n\t\tif (type === 'less' && ! equals) return first.getTime() < second;\n\t\tif (type === 'more' && equals) return first.getTime() >= second;\n\t\tif (type === 'more' && ! equals) return first.getTime() > second;\n\t}\n\n\n\n\t/**\n\t * @internal.\n\t *\n\t **/\n\t_defaultMessages()\n\t{\n\t\treturn {\n\t\t\tafter         : `The date must be after: '[PARAM]'`,\n\t\t\tafterOrEqual  : `The date must be after or equal to: '[PARAM]'`,\n\t\t\tarray         : `Value must be an array`,\n\t\t\tbefore        : `The date must be before: '[PARAM]'`,\n\t\t\tbeforeOrEqual : `The date must be before or equal to: '[PARAM]'`,\n\t\t\tboolean       : `Value must be true or false`,\n\t\t\tdate          : `Value must be a date`,\n\t\t\tdifferent     : `Value must be different to '[PARAM]'`,\n\t\t\tendingWith    : `Value must end with '[PARAM]'`,\n\t\t\temail         : `Value must be a valid email address`,\n\t\t\tfalsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,\n\t\t\tin     \t\t  : `Value must be one of the following options: [PARAM]`,\n\t\t\tinteger       : `Value must be an integer`,\n\t\t\tjson          : `Value must be a parsable JSON object string`,\n\t\t\tmaximum       : `Value must not be greater than '[PARAM]' in size or character length`,\n\t\t\tminimum       : `Value must not be less than '[PARAM]' in size or character length`,\n\t\t\tnotIn         : `Value must not be one of the following options: [PARAM]`,\n\t\t\tnumeric       : `Value must be numeric`,\n\t\t\toptional      : `Value is optional`,\n\t\t\tregexMatch    : `Value must satisify the regular expression: [PARAM]`,\n\t\t\trequired      : `Value must be present`,\n\t\t\tsame          : `Value must be '[PARAM]'`,\n\t\t\tstartingWith  : `Value must start with '[PARAM]'`,\n\t\t\tstring        : `Value must be a string`,\n\t\t\ttruthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,\n\t\t\turl           : `Value must be a valid url`,\n\t\t\tuuid          : `Value must be a valid UUID`,\n\t\t};\n\t}\n\n\n\n\t/**\n\t * Attach a custom validation rule to the library.\n\t *\n\t **/\n\taddRule(name, closure)\n\t{\n\t\tIodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;\n\t}\n\n\n\n\t/**\n\t * Retrieve an error message for the given rule.\n\t *\n\t **/\n\tgetErrorMessage(rule, arg = undefined)\n\t{\n\t\tlet key   = rule.split(':')[0];\n\t\tlet param = arg || rule.split(':')[1];\n\n\t\tif (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {\n\t\t\tparam = new Date(parseInt(param)).toLocaleTimeString(undefined, {\n\t\t\t\tyear: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'\n\t\t\t});\n\t\t}\n\n\t\treturn [null, undefined].includes(param)\n\t\t\t ? this.messages[key]\n\t\t\t : this.messages[key].replace(\"[PARAM]\", param);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is after another given date.\n\t *\n\t **/\n\tisAfter(value, after)\n\t{\n\t\treturn this._dateCompare(value, after, 'more', false);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is after or equal to another given date.\n\t *\n\t **/\n\tisAfterOrEqual(value, after)\n\t{\n\t\treturn this._dateCompare(value, after, 'more', true);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is an array.\n\t *\n\t **/\n\tisArray(value)\n\t{\n\t\treturn Array.isArray(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is before another given date.\n\t *\n\t **/\n\tisBefore(value, before)\n\t{\n\t\treturn this._dateCompare(value, before, 'less', false);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is before or equal to another given date.\n\t *\n\t **/\n\tisBeforeOrEqual(value, before)\n\t{\n\t\treturn this._dateCompare(value, before, 'less', true);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a boolean.\n\t *\n\t **/\n\tisBoolean(value)\n\t{\n\t\treturn [true, false].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a date object.\n\t *\n\t **/\n\tisDate(value)\n\t{\n\t\treturn value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is different to another given value.\n\t *\n\t **/\n\tisDifferent(value, different)\n\t{\n\t\treturn value != different;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value ends with another given value.\n\t *\n\t **/\n\tisEndingWith(value, sub)\n\t{\n\t\treturn this.isString(value) && value.endsWith(sub);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid email address.\n\t *\n\t **/\n\tisEmail(value)\n\t{\n\t\treturn new RegExp('^\\\\S+@\\\\S+[\\\\.][0-9a-z]+$').test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is falsy.\n\t *\n\t **/\n\tisFalsy(value)\n\t{\n\t\treturn [0, '0', false, 'false'].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is within the given array of options.\n\t *\n\t **/\n\tisIn(value, options)\n\t{\n\t\toptions = typeof options === 'string'\n\t\t\t\t? options.split(\",\")\n\t\t\t\t: options;\n\n\t\treturn options.includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is an integer.\n\t *\n\t **/\n\tisInteger(value)\n\t{\n\t\treturn Number.isInteger(value) && parseInt(value).toString() === value.toString();\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a JSON string.\n\t *\n\t **/\n\tisJson(value)\n\t{\n\t\ttry {\n        \treturn typeof JSON.parse(value) === 'object';\n\t\t} catch (e) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\n\n\t/**\n\t * Determine if the given value meets the given maximum limit.\n\t *\n\t **/\n\tisMaximum(value, limit)\n\t{\n\t\tvalue = typeof value === 'string' ? value.length : value;\n\n\t\treturn parseFloat(value) <= limit;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value meets the given minimum limit.\n\t *\n\t **/\n\tisMinimum(value, limit)\n\t{\n\t\tvalue = typeof value === 'string' ? value.length : value;\n\n\t\treturn parseFloat(value) >= limit;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is not within the given array of options.\n\t *\n\t **/\n\tisNotIn(value, options)\n\t{\n\t\treturn ! this.isIn(value, options);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is numeric (an integer or a float).\n\t *\n\t **/\n\tisNumeric(value)\n\t{\n\t\treturn ! isNaN(parseFloat(value)) && isFinite(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is optional.\n\t *\n\t **/\n\tisOptional(value)\n\t{\n\t\treturn [null, undefined, ''].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value satisifies the given regular expression.\n\t *\n\t **/\n\tisRegexMatch(value, expression)\n\t{\n\t\treturn new RegExp(expression).test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is present.\n\t *\n\t **/\n\tisRequired(value)\n\t{\n\t\treturn ! this.isOptional(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is the same as another given value.\n\t *\n\t **/\n\tisSame(value, same)\n\t{\n\t\treturn value == same;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value starts with another given value.\n\t *\n\t **/\n\tisStartingWith(value, sub)\n\t{\n\t\treturn this.isString(value) && value.startsWith(sub);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a string.\n\t *\n\t **/\n\tisString(value)\n\t{\n\t\treturn typeof value === 'string';\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is truthy.\n\t *\n\t **/\n\tisTruthy(value)\n\t{\n\t\treturn [1, '1', true, 'true'].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid URL.\n\t *\n\t **/\n\tisUrl(value)\n\t{\n\t\treturn new RegExp('^(https?:\\\\/\\\\/)?((([a-z\\\\d]([a-z\\\\d-]*[a-z\\\\d])*)\\\\.)+[a-z]{2,}|((\\\\d{1,3}\\\\.){3}\\\\d{1,3}))(\\\\:\\\\d+)?(\\\\/[-a-z\\\\d%_.~+]*)*(\\\\?[;&a-z\\\\d%_.~+=-]*)?(\\\\#[-a-z\\\\d_]*)?$')\n\t\t\t .test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid UUID.\n\t *\n\t **/\n\tisUuid(value)\n\t{\n\t\treturn 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+{"version":3,"file":"iodine.min.mjs","sources":["../src/iodine.js"],"sourcesContent":["/*\n|--------------------------------------------------------------------------\n| Iodine - JavaScript Library\n|--------------------------------------------------------------------------\n|\n| This library contains a collection of useful validation rules that can\n| be used to quickly verify whether items meet certain conditions.\n|\n*/\nclass Iodine\n{\n\n    /**\n     * Constructor.\n     *\n     **/\n    constructor()\n    {\n        this.messages = this._defaultMessages();\n    }\n\n\n\n    /**\n     * @internal.\n     *\n     **/\n    _dateCompare(first, second, type, equals = false)\n    {\n        if (! this.isDate(first)) return false;\n\n        if (! this.isDate(second) && ! this.isInteger(second)) return false;\n\n        second = typeof second === 'number' ? second : second.getTime();\n\n        if (type === 'less' && equals) return first.getTime() <= second;\n        if (type === 'less' && ! equals) return first.getTime() < second;\n        if (type === 'more' && equals) return first.getTime() >= second;\n        if (type === 'more' && ! equals) return first.getTime() > second;\n    }\n\n\n\n    /**\n     * @internal.\n     *\n     **/\n    _defaultMessages()\n    {\n        return {\n            after         : `The date must be after: '[PARAM]'`,\n            afterOrEqual  : `The date must be after or equal to: '[PARAM]'`,\n            array         : `Value must be an array`,\n            before        : `The date must be before: '[PARAM]'`,\n            beforeOrEqual : `The date must be before or equal to: '[PARAM]'`,\n            boolean       : `Value must be true or false`,\n            date          : `Value must be a date`,\n            different     : `Value must be different to '[PARAM]'`,\n            endingWith    : `Value must end with '[PARAM]'`,\n            email         : `Value must be a valid email address`,\n            falsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,\n            in               : `Value must be one of the following options: [PARAM]`,\n            integer       : `Value must be an integer`,\n            json          : `Value must be a parsable JSON object string`,\n            maximum       : `Value must not be greater than '[PARAM]' in size or character length`,\n            minimum       : `Value must not be less than '[PARAM]' in size or character length`,\n            notIn         : `Value must not be one of the following options: [PARAM]`,\n            numeric       : `Value must be numeric`,\n            optional      : `Value is optional`,\n            regexMatch    : `Value must satisify the regular expression: [PARAM]`,\n            required      : `Value must be present`,\n            same          : `Value must be '[PARAM]'`,\n            startingWith  : `Value must start with '[PARAM]'`,\n            string        : `Value must be a string`,\n            truthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,\n            url           : `Value must be a valid url`,\n            uuid          : `Value must be a valid UUID`,\n        };\n    }\n\n\n\n    /**\n     * Attach a custom validation rule to the library.\n     *\n     **/\n    addRule(name, closure)\n    {\n        Iodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;\n    }\n\n\n\n    /**\n     * Retrieve an error message for the given rule.\n     *\n     **/\n    getErrorMessage(rule, arg = undefined)\n    {\n        let key   = rule.split(':')[0];\n        let param = arg || rule.split(':')[1];\n\n        if (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {\n            param = new Date(parseInt(param)).toLocaleTimeString(undefined, {\n                year: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'\n            });\n        }\n\n        return [null, undefined].includes(param)\n             ? this.messages[key]\n             : this.messages[key].replace('[PARAM]', param);\n    }\n\n\n\n    /**\n     * Determine if the given date is after another given date.\n     *\n     **/\n    isAfter(value, after)\n    {\n        return this._dateCompare(value, after, 'more', false);\n    }\n\n\n\n    /**\n     * Determine if the given date is after or equal to another given date.\n     *\n     **/\n    isAfterOrEqual(value, after)\n    {\n        return this._dateCompare(value, after, 'more', true);\n    }\n\n\n\n    /**\n     * Determine if the given value is an array.\n     *\n     **/\n    isArray(value)\n    {\n        return Array.isArray(value);\n    }\n\n\n\n    /**\n     * Determine if the given date is before another given date.\n     *\n     **/\n    isBefore(value, before)\n    {\n        return this._dateCompare(value, before, 'less', false);\n    }\n\n\n\n    /**\n     * Determine if the given date is before or equal to another given date.\n     *\n     **/\n    isBeforeOrEqual(value, before)\n    {\n        return this._dateCompare(value, before, 'less', true);\n    }\n\n\n\n    /**\n     * Determine if the given value is a boolean.\n     *\n     **/\n    isBoolean(value)\n    {\n        return [true, false].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is a date object.\n     *\n     **/\n    isDate(value)\n    {\n        return value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is different to another given value.\n     *\n     **/\n    isDifferent(value, different)\n    {\n        return value != different;\n    }\n\n\n\n    /**\n     * Determine if the given value ends with another given value.\n     *\n     **/\n    isEndingWith(value, sub)\n    {\n        return this.isString(value) && value.endsWith(sub);\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid email address.\n     *\n     **/\n    isEmail(value)\n    {\n        return new RegExp('^\\\\S+@\\\\S+[\\\\.][0-9a-z]+$').test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is falsy.\n     *\n     **/\n    isFalsy(value)\n    {\n        return [0, '0', false, 'false'].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is within the given array of options.\n     *\n     **/\n    isIn(value, options)\n    {\n        options = typeof options === 'string'\n                ? options.split(',')\n                : options;\n\n        return options.includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is an integer.\n     *\n     **/\n    isInteger(value)\n    {\n        return Number.isInteger(value) && parseInt(value).toString() === value.toString();\n    }\n\n\n\n    /**\n     * Determine if the given value is a JSON string.\n     *\n     **/\n    isJson(value)\n    {\n        try {\n            return typeof JSON.parse(value) === 'object';\n        } catch (e) {\n            return false;\n        }\n    }\n\n\n\n    /**\n     * Determine if the given value meets the given maximum limit.\n     *\n     **/\n    isMaximum(value, limit)\n    {\n        value = typeof value === 'string' ? value.length : value;\n\n        return parseFloat(value) <= limit;\n    }\n\n\n\n    /**\n     * Determine if the given value meets the given minimum limit.\n     *\n     **/\n    isMinimum(value, limit)\n    {\n        value = typeof value === 'string' ? value.length : value;\n\n        return parseFloat(value) >= limit;\n    }\n\n\n\n    /**\n     * Determine if the given value is not within the given array of options.\n     *\n     **/\n    isNotIn(value, options)\n    {\n        return ! this.isIn(value, options);\n    }\n\n\n\n    /**\n     * Determine if the given value is numeric (an integer or a float).\n     *\n     **/\n    isNumeric(value)\n    {\n        return ! isNaN(parseFloat(value)) && isFinite(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is optional.\n     *\n     **/\n    isOptional(value)\n    {\n        return [null, undefined, ''].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value satisifies the given regular expression.\n     *\n     **/\n    isRegexMatch(value, expression)\n    {\n        return new RegExp(expression).test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is present.\n     *\n     **/\n    isRequired(value)\n    {\n        return ! this.isOptional(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is the same as another given value.\n     *\n     **/\n    isSame(value, same)\n    {\n        return value == same;\n    }\n\n\n\n    /**\n     * Determine if the given value starts with another given value.\n     *\n     **/\n    isStartingWith(value, sub)\n    {\n        return this.isString(value) && value.startsWith(sub);\n    }\n\n\n\n    /**\n     * Determine if the given value is a string.\n     *\n     **/\n    isString(value)\n    {\n        return typeof value === 'string';\n    }\n\n\n\n    /**\n     * Determine if the given value is truthy.\n     *\n     **/\n    isTruthy(value)\n    {\n        return [1, '1', true, 'true'].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid URL.\n     *\n     **/\n    isUrl(value)\n    {\n        return new RegExp('^(https?:\\\\/\\\\/)?((([a-z\\\\d]([a-z\\\\d-]*[a-z\\\\d])*)\\\\.)+[a-z]{2,}|((\\\\d{1,3}\\\\.){3}\\\\d{1,3}))(\\\\:\\\\d+)?(\\\\/[-a-z\\\\d%_.~+]*)*(\\\\?[;&a-z\\\\d%_.~+=-]*)?(\\\\#[-a-z\\\\d_]*)?$')\n             .test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid UUID.\n     *\n     **/\n    isUuid(value)\n    {\n        return new RegExp('^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$')\n             .test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine whether the given value meets the given rules.\n     *\n     **/\n    is(value, rules = [])\n    {\n        if (! rules.length) return true;\n\n        if (rules[0] === 'optional' && this.isOptional(value)) return true;\n\n        for (let index in rules) {\n\n            if (rules[index] === 'optional') continue;\n\n            let rule = rules[index].split(':')[0][0].toUpperCase()\n                     + rules[index].split(':')[0].slice(1);\n\n            let result = this[`is${rule}`].apply(this, [value, rules[index].split(':')[1]]);\n\n            if (! result) return rules[index];\n\n        }\n\n        return true;\n    }\n\n\n\n    /**\n     * Replace the default error messages with a new set.\n     *\n     **/\n    setErrorMessages(messages)\n    {\n        this.messages = messages;\n    }\n\n}\n\n\n\n/**\n * Create an instance of the library.\n *\n **/\nwindow.Iodine = new 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diff --git a/dist/iodine.min.umd.js.map b/dist/iodine.min.umd.js.map
index 0a85149..18707ce 100644
--- a/dist/iodine.min.umd.js.map
+++ b/dist/iodine.min.umd.js.map
@@ -1 +1 @@
-{"version":3,"file":"iodine.min.umd.js","sources":["../src/iodine.js"],"sourcesContent":["/*\n|--------------------------------------------------------------------------\n| Iodine - JavaScript Library\n|--------------------------------------------------------------------------\n|\n| This library contains a collection of useful validation rules that can\n| be used to quickly verify whether items meet certain conditions.\n|\n*/\nclass Iodine\n{\n\n\t/**\n\t * Constructor.\n\t *\n\t **/\n\tconstructor()\n\t{\n\t\tthis.messages = this._defaultMessages();\n\t}\n\n\n\n\t/**\n\t * @internal.\n\t *\n\t **/\n\t_dateCompare(first, second, type, equals = false)\n\t{\n\t\tif (! this.isDate(first)) return false;\n\n\t\tif (! this.isDate(second) && ! this.isInteger(second)) return false;\n\n\t\tsecond = typeof second === 'number' ? second : second.getTime();\n\n\t\tif (type === 'less' && equals) return first.getTime() <= second;\n\t\tif (type === 'less' && ! equals) return first.getTime() < second;\n\t\tif (type === 'more' && equals) return first.getTime() >= second;\n\t\tif (type === 'more' && ! equals) return first.getTime() > second;\n\t}\n\n\n\n\t/**\n\t * @internal.\n\t *\n\t **/\n\t_defaultMessages()\n\t{\n\t\treturn {\n\t\t\tafter         : `The date must be after: '[PARAM]'`,\n\t\t\tafterOrEqual  : `The date must be after or equal to: '[PARAM]'`,\n\t\t\tarray         : `Value must be an array`,\n\t\t\tbefore        : `The date must be before: '[PARAM]'`,\n\t\t\tbeforeOrEqual : `The date must be before or equal to: '[PARAM]'`,\n\t\t\tboolean       : `Value must be true or false`,\n\t\t\tdate          : `Value must be a date`,\n\t\t\tdifferent     : `Value must be different to '[PARAM]'`,\n\t\t\tendingWith    : `Value must end with '[PARAM]'`,\n\t\t\temail         : `Value must be a valid email address`,\n\t\t\tfalsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,\n\t\t\tin     \t\t  : `Value must be one of the following options: [PARAM]`,\n\t\t\tinteger       : `Value must be an integer`,\n\t\t\tjson          : `Value must be a parsable JSON object string`,\n\t\t\tmaximum       : `Value must not be greater than '[PARAM]' in size or character length`,\n\t\t\tminimum       : `Value must not be less than '[PARAM]' in size or character length`,\n\t\t\tnotIn         : `Value must not be one of the following options: [PARAM]`,\n\t\t\tnumeric       : `Value must be numeric`,\n\t\t\toptional      : `Value is optional`,\n\t\t\tregexMatch    : `Value must satisify the regular expression: [PARAM]`,\n\t\t\trequired      : `Value must be present`,\n\t\t\tsame          : `Value must be '[PARAM]'`,\n\t\t\tstartingWith  : `Value must start with '[PARAM]'`,\n\t\t\tstring        : `Value must be a string`,\n\t\t\ttruthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,\n\t\t\turl           : `Value must be a valid url`,\n\t\t\tuuid          : `Value must be a valid UUID`,\n\t\t};\n\t}\n\n\n\n\t/**\n\t * Attach a custom validation rule to the library.\n\t *\n\t **/\n\taddRule(name, closure)\n\t{\n\t\tIodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;\n\t}\n\n\n\n\t/**\n\t * Retrieve an error message for the given rule.\n\t *\n\t **/\n\tgetErrorMessage(rule, arg = undefined)\n\t{\n\t\tlet key   = rule.split(':')[0];\n\t\tlet param = arg || rule.split(':')[1];\n\n\t\tif (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {\n\t\t\tparam = new Date(parseInt(param)).toLocaleTimeString(undefined, {\n\t\t\t\tyear: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'\n\t\t\t});\n\t\t}\n\n\t\treturn [null, undefined].includes(param)\n\t\t\t ? this.messages[key]\n\t\t\t : this.messages[key].replace(\"[PARAM]\", param);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is after another given date.\n\t *\n\t **/\n\tisAfter(value, after)\n\t{\n\t\treturn this._dateCompare(value, after, 'more', false);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is after or equal to another given date.\n\t *\n\t **/\n\tisAfterOrEqual(value, after)\n\t{\n\t\treturn this._dateCompare(value, after, 'more', true);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is an array.\n\t *\n\t **/\n\tisArray(value)\n\t{\n\t\treturn Array.isArray(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is before another given date.\n\t *\n\t **/\n\tisBefore(value, before)\n\t{\n\t\treturn this._dateCompare(value, before, 'less', false);\n\t}\n\n\n\n\t/**\n\t * Determine if the given date is before or equal to another given date.\n\t *\n\t **/\n\tisBeforeOrEqual(value, before)\n\t{\n\t\treturn this._dateCompare(value, before, 'less', true);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a boolean.\n\t *\n\t **/\n\tisBoolean(value)\n\t{\n\t\treturn [true, false].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a date object.\n\t *\n\t **/\n\tisDate(value)\n\t{\n\t\treturn value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is different to another given value.\n\t *\n\t **/\n\tisDifferent(value, different)\n\t{\n\t\treturn value != different;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value ends with another given value.\n\t *\n\t **/\n\tisEndingWith(value, sub)\n\t{\n\t\treturn this.isString(value) && value.endsWith(sub);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid email address.\n\t *\n\t **/\n\tisEmail(value)\n\t{\n\t\treturn new RegExp('^\\\\S+@\\\\S+[\\\\.][0-9a-z]+$').test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is falsy.\n\t *\n\t **/\n\tisFalsy(value)\n\t{\n\t\treturn [0, '0', false, 'false'].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is within the given array of options.\n\t *\n\t **/\n\tisIn(value, options)\n\t{\n\t\toptions = typeof options === 'string'\n\t\t\t\t? options.split(\",\")\n\t\t\t\t: options;\n\n\t\treturn options.includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is an integer.\n\t *\n\t **/\n\tisInteger(value)\n\t{\n\t\treturn Number.isInteger(value) && parseInt(value).toString() === value.toString();\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a JSON string.\n\t *\n\t **/\n\tisJson(value)\n\t{\n\t\ttry {\n        \treturn typeof JSON.parse(value) === 'object';\n\t\t} catch (e) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\n\n\t/**\n\t * Determine if the given value meets the given maximum limit.\n\t *\n\t **/\n\tisMaximum(value, limit)\n\t{\n\t\tvalue = typeof value === 'string' ? value.length : value;\n\n\t\treturn parseFloat(value) <= limit;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value meets the given minimum limit.\n\t *\n\t **/\n\tisMinimum(value, limit)\n\t{\n\t\tvalue = typeof value === 'string' ? value.length : value;\n\n\t\treturn parseFloat(value) >= limit;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is not within the given array of options.\n\t *\n\t **/\n\tisNotIn(value, options)\n\t{\n\t\treturn ! this.isIn(value, options);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is numeric (an integer or a float).\n\t *\n\t **/\n\tisNumeric(value)\n\t{\n\t\treturn ! isNaN(parseFloat(value)) && isFinite(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is optional.\n\t *\n\t **/\n\tisOptional(value)\n\t{\n\t\treturn [null, undefined, ''].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value satisifies the given regular expression.\n\t *\n\t **/\n\tisRegexMatch(value, expression)\n\t{\n\t\treturn new RegExp(expression).test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is present.\n\t *\n\t **/\n\tisRequired(value)\n\t{\n\t\treturn ! this.isOptional(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is the same as another given value.\n\t *\n\t **/\n\tisSame(value, same)\n\t{\n\t\treturn value == same;\n\t}\n\n\n\n\t/**\n\t * Determine if the given value starts with another given value.\n\t *\n\t **/\n\tisStartingWith(value, sub)\n\t{\n\t\treturn this.isString(value) && value.startsWith(sub);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a string.\n\t *\n\t **/\n\tisString(value)\n\t{\n\t\treturn typeof value === 'string';\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is truthy.\n\t *\n\t **/\n\tisTruthy(value)\n\t{\n\t\treturn [1, '1', true, 'true'].includes(value);\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid URL.\n\t *\n\t **/\n\tisUrl(value)\n\t{\n\t\treturn new RegExp('^(https?:\\\\/\\\\/)?((([a-z\\\\d]([a-z\\\\d-]*[a-z\\\\d])*)\\\\.)+[a-z]{2,}|((\\\\d{1,3}\\\\.){3}\\\\d{1,3}))(\\\\:\\\\d+)?(\\\\/[-a-z\\\\d%_.~+]*)*(\\\\?[;&a-z\\\\d%_.~+=-]*)?(\\\\#[-a-z\\\\d_]*)?$')\n\t\t\t .test(String(value).toLowerCase());\n\t}\n\n\n\n\t/**\n\t * Determine if the given value is a valid UUID.\n\t *\n\t **/\n\tisUuid(value)\n\t{\n\t\treturn 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+{"version":3,"file":"iodine.min.umd.js","sources":["../src/iodine.js"],"sourcesContent":["/*\n|--------------------------------------------------------------------------\n| Iodine - JavaScript Library\n|--------------------------------------------------------------------------\n|\n| This library contains a collection of useful validation rules that can\n| be used to quickly verify whether items meet certain conditions.\n|\n*/\nclass Iodine\n{\n\n    /**\n     * Constructor.\n     *\n     **/\n    constructor()\n    {\n        this.messages = this._defaultMessages();\n    }\n\n\n\n    /**\n     * @internal.\n     *\n     **/\n    _dateCompare(first, second, type, equals = false)\n    {\n        if (! this.isDate(first)) return false;\n\n        if (! this.isDate(second) && ! this.isInteger(second)) return false;\n\n        second = typeof second === 'number' ? second : second.getTime();\n\n        if (type === 'less' && equals) return first.getTime() <= second;\n        if (type === 'less' && ! equals) return first.getTime() < second;\n        if (type === 'more' && equals) return first.getTime() >= second;\n        if (type === 'more' && ! equals) return first.getTime() > second;\n    }\n\n\n\n    /**\n     * @internal.\n     *\n     **/\n    _defaultMessages()\n    {\n        return {\n            after         : `The date must be after: '[PARAM]'`,\n            afterOrEqual  : `The date must be after or equal to: '[PARAM]'`,\n            array         : `Value must be an array`,\n            before        : `The date must be before: '[PARAM]'`,\n            beforeOrEqual : `The date must be before or equal to: '[PARAM]'`,\n            boolean       : `Value must be true or false`,\n            date          : `Value must be a date`,\n            different     : `Value must be different to '[PARAM]'`,\n            endingWith    : `Value must end with '[PARAM]'`,\n            email         : `Value must be a valid email address`,\n            falsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,\n            in               : `Value must be one of the following options: [PARAM]`,\n            integer       : `Value must be an integer`,\n            json          : `Value must be a parsable JSON object string`,\n            maximum       : `Value must not be greater than '[PARAM]' in size or character length`,\n            minimum       : `Value must not be less than '[PARAM]' in size or character length`,\n            notIn         : `Value must not be one of the following options: [PARAM]`,\n            numeric       : `Value must be numeric`,\n            optional      : `Value is optional`,\n            regexMatch    : `Value must satisify the regular expression: [PARAM]`,\n            required      : `Value must be present`,\n            same          : `Value must be '[PARAM]'`,\n            startingWith  : `Value must start with '[PARAM]'`,\n            string        : `Value must be a string`,\n            truthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,\n            url           : `Value must be a valid url`,\n            uuid          : `Value must be a valid UUID`,\n        };\n    }\n\n\n\n    /**\n     * Attach a custom validation rule to the library.\n     *\n     **/\n    addRule(name, closure)\n    {\n        Iodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;\n    }\n\n\n\n    /**\n     * Retrieve an error message for the given rule.\n     *\n     **/\n    getErrorMessage(rule, arg = undefined)\n    {\n        let key   = rule.split(':')[0];\n        let param = arg || rule.split(':')[1];\n\n        if (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {\n            param = new Date(parseInt(param)).toLocaleTimeString(undefined, {\n                year: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'\n            });\n        }\n\n        return [null, undefined].includes(param)\n             ? this.messages[key]\n             : this.messages[key].replace('[PARAM]', param);\n    }\n\n\n\n    /**\n     * Determine if the given date is after another given date.\n     *\n     **/\n    isAfter(value, after)\n    {\n        return this._dateCompare(value, after, 'more', false);\n    }\n\n\n\n    /**\n     * Determine if the given date is after or equal to another given date.\n     *\n     **/\n    isAfterOrEqual(value, after)\n    {\n        return this._dateCompare(value, after, 'more', true);\n    }\n\n\n\n    /**\n     * Determine if the given value is an array.\n     *\n     **/\n    isArray(value)\n    {\n        return Array.isArray(value);\n    }\n\n\n\n    /**\n     * Determine if the given date is before another given date.\n     *\n     **/\n    isBefore(value, before)\n    {\n        return this._dateCompare(value, before, 'less', false);\n    }\n\n\n\n    /**\n     * Determine if the given date is before or equal to another given date.\n     *\n     **/\n    isBeforeOrEqual(value, before)\n    {\n        return this._dateCompare(value, before, 'less', true);\n    }\n\n\n\n    /**\n     * Determine if the given value is a boolean.\n     *\n     **/\n    isBoolean(value)\n    {\n        return [true, false].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is a date object.\n     *\n     **/\n    isDate(value)\n    {\n        return value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is different to another given value.\n     *\n     **/\n    isDifferent(value, different)\n    {\n        return value != different;\n    }\n\n\n\n    /**\n     * Determine if the given value ends with another given value.\n     *\n     **/\n    isEndingWith(value, sub)\n    {\n        return this.isString(value) && value.endsWith(sub);\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid email address.\n     *\n     **/\n    isEmail(value)\n    {\n        return new RegExp('^\\\\S+@\\\\S+[\\\\.][0-9a-z]+$').test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is falsy.\n     *\n     **/\n    isFalsy(value)\n    {\n        return [0, '0', false, 'false'].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is within the given array of options.\n     *\n     **/\n    isIn(value, options)\n    {\n        options = typeof options === 'string'\n                ? options.split(',')\n                : options;\n\n        return options.includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is an integer.\n     *\n     **/\n    isInteger(value)\n    {\n        return Number.isInteger(value) && parseInt(value).toString() === value.toString();\n    }\n\n\n\n    /**\n     * Determine if the given value is a JSON string.\n     *\n     **/\n    isJson(value)\n    {\n        try {\n            return typeof JSON.parse(value) === 'object';\n        } catch (e) {\n            return false;\n        }\n    }\n\n\n\n    /**\n     * Determine if the given value meets the given maximum limit.\n     *\n     **/\n    isMaximum(value, limit)\n    {\n        value = typeof value === 'string' ? value.length : value;\n\n        return parseFloat(value) <= limit;\n    }\n\n\n\n    /**\n     * Determine if the given value meets the given minimum limit.\n     *\n     **/\n    isMinimum(value, limit)\n    {\n        value = typeof value === 'string' ? value.length : value;\n\n        return parseFloat(value) >= limit;\n    }\n\n\n\n    /**\n     * Determine if the given value is not within the given array of options.\n     *\n     **/\n    isNotIn(value, options)\n    {\n        return ! this.isIn(value, options);\n    }\n\n\n\n    /**\n     * Determine if the given value is numeric (an integer or a float).\n     *\n     **/\n    isNumeric(value)\n    {\n        return ! isNaN(parseFloat(value)) && isFinite(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is optional.\n     *\n     **/\n    isOptional(value)\n    {\n        return [null, undefined, ''].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value satisifies the given regular expression.\n     *\n     **/\n    isRegexMatch(value, expression)\n    {\n        return new RegExp(expression).test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is present.\n     *\n     **/\n    isRequired(value)\n    {\n        return ! this.isOptional(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is the same as another given value.\n     *\n     **/\n    isSame(value, same)\n    {\n        return value == same;\n    }\n\n\n\n    /**\n     * Determine if the given value starts with another given value.\n     *\n     **/\n    isStartingWith(value, sub)\n    {\n        return this.isString(value) && value.startsWith(sub);\n    }\n\n\n\n    /**\n     * Determine if the given value is a string.\n     *\n     **/\n    isString(value)\n    {\n        return typeof value === 'string';\n    }\n\n\n\n    /**\n     * Determine if the given value is truthy.\n     *\n     **/\n    isTruthy(value)\n    {\n        return [1, '1', true, 'true'].includes(value);\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid URL.\n     *\n     **/\n    isUrl(value)\n    {\n        return new RegExp('^(https?:\\\\/\\\\/)?((([a-z\\\\d]([a-z\\\\d-]*[a-z\\\\d])*)\\\\.)+[a-z]{2,}|((\\\\d{1,3}\\\\.){3}\\\\d{1,3}))(\\\\:\\\\d+)?(\\\\/[-a-z\\\\d%_.~+]*)*(\\\\?[;&a-z\\\\d%_.~+=-]*)?(\\\\#[-a-z\\\\d_]*)?$')\n             .test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine if the given value is a valid UUID.\n     *\n     **/\n    isUuid(value)\n    {\n        return new RegExp('^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$')\n             .test(String(value).toLowerCase());\n    }\n\n\n\n    /**\n     * Determine whether the given value meets the given rules.\n     *\n     **/\n    is(value, rules = [])\n    {\n        if (! rules.length) return true;\n\n        if (rules[0] === 'optional' && this.isOptional(value)) return true;\n\n        for (let index in rules) {\n\n            if (rules[index] === 'optional') continue;\n\n            let rule = rules[index].split(':')[0][0].toUpperCase()\n                     + rules[index].split(':')[0].slice(1);\n\n            let result = this[`is${rule}`].apply(this, [value, rules[index].split(':')[1]]);\n\n            if (! result) return rules[index];\n\n        }\n\n        return true;\n    }\n\n\n\n    /**\n     * Replace the default error messages with a new set.\n     *\n     **/\n    setErrorMessages(messages)\n    {\n        this.messages = messages;\n    }\n\n}\n\n\n\n/**\n * Create an instance of the library.\n *\n **/\nwindow.Iodine = new Iodine();\n"],"names":["Iodine","constructor","messages","this","_defaultMessages","_dateCompare","first","second","type","equals","isDate","isInteger","getTime","after","afterOrEqual","array","before","beforeOrEqual","boolean","date","different","endingWith","email","falsy","in","integer","json","maximum","minimum","notIn","numeric","optional","regexMatch","required","same","startingWith","string","truthy","url","uuid","addRule","name","closure","prototype","toUpperCase","slice","getErrorMessage","rule","arg","undefined","key","split","param","includes","Date","parseInt","toLocaleTimeString","year","month","day","hour","minute","replace","isAfter","value","isAfterOrEqual","isArray","Array","isBefore","isBeforeOrEqual","isBoolean","Object","toString","call","isNaN","isDifferent","isEndingWith","sub","isString","endsWith","isEmail","RegExp","test","String","toLowerCase","isFalsy","isIn","options","Number","isJson","JSON","parse","e","isMaximum","limit","length","parseFloat","isMinimum","isNotIn","isNumeric","isFinite","isOptional","isRegexMatch","expression","isRequired","isSame","isStartingWith","startsWith","isTruthy","isUrl","isUuid","is","rules","let","index","apply","setErrorMessages","window"],"mappings":"0IASA,IAAMA,EAOFC,gBAESC,SAAWC,KAAKC,gCASzBC,sBAAaC,EAAOC,EAAQC,EAAMC,0BAAS,KAEjCN,KAAKO,OAAOJ,OAEZH,KAAKO,OAAOH,KAAaJ,KAAKQ,UAAUJ,MAE9CA,EAA2B,iBAAXA,EAAsBA,EAASA,EAAOK,UAEzC,SAATJ,GAAmBC,EAAeH,EAAMM,WAAaL,EAC5C,SAATC,GAAqBC,EACZ,SAATD,GAAmBC,EAAeH,EAAMM,WAAaL,EAC5C,SAATC,GAAqBC,SAAeH,EAAMM,UAAYL,EAFlBD,EAAMM,UAAYL,gBAW9DH,kCAEW,CACHS,MAAiB,oCACjBC,aAAiB,gDACjBC,MAAiB,yBACjBC,OAAiB,qCACjBC,cAAiB,iDACjBC,QAAiB,8BACjBC,KAAiB,uBACjBC,UAAiB,uCACjBC,WAAiB,gCACjBC,MAAiB,sCACjBC,MAAiB,yDACjBC,GAAoB,sDACpBC,QAAiB,2BACjBC,KAAiB,8CACjBC,QAAiB,uEACjBC,QAAiB,oEACjBC,MAAiB,0DACjBC,QAAiB,wBACjBC,SAAiB,oBACjBC,WAAiB,sDACjBC,SAAiB,wBACjBC,KAAiB,0BACjBC,aAAiB,kCACjBC,OAAiB,yBACjBC,OAAiB,wDACjBC,IAAiB,4BACjBC,KAAiB,2CAUzBC,iBAAQC,EAAMC,GAEV1C,EAAO2C,eAAeF,EAAK,GAAGG,cAAgBH,EAAKI,MAAM,IAAQH,eASrEI,yBAAgBC,EAAMC,uBAAMC,OAEpBC,EAAQH,EAAKI,MAAM,KAAK,GACxBC,EAAQJ,GAAOD,EAAKI,MAAM,KAAK,SAE/B,CAAC,QAAS,eAAgB,SAAU,iBAAiBE,SAASH,KAC9DE,EAAQ,IAAIE,KAAKC,SAASH,IAAQI,wBAAmBP,EAAW,CAC5DQ,KAAM,UAAWC,MAAO,QAASC,IAAK,UAAWC,KAAM,UAAWC,OAAQ,aAI3E,CAAC,UAAMZ,GAAWI,SAASD,GAC3BjD,KAAKD,SAASgD,GACd/C,KAAKD,SAASgD,GAAKY,QAAQ,UAAWV,gBASjDW,iBAAQC,EAAOnD,UAEJV,KAAKE,aAAa2D,EAAOnD,EAAO,QAAQ,gBASnDoD,wBAAeD,EAAOnD,UAEXV,KAAKE,aAAa2D,EAAOnD,EAAO,QAAQ,gBASnDqD,iBAAQF,UAEGG,MAAMD,QAAQF,gBASzBI,kBAASJ,EAAOhD,UAELb,KAAKE,aAAa2D,EAAOhD,EAAQ,QAAQ,gBASpDqD,yBAAgBL,EAAOhD,UAEZb,KAAKE,aAAa2D,EAAOhD,EAAQ,QAAQ,gBASpDsD,mBAAUN,SAEC,EAAC,GAAM,GAAOX,SAASW,gBASlCtD,gBAAOsD,UAEIA,GAAmD,kBAA1CO,OAAO5B,UAAU6B,SAASC,KAAKT,KAAgCU,MAAMV,gBASzFW,qBAAYX,EAAO5C,UAER4C,GAAS5C,eASpBwD,sBAAaZ,EAAOa,UAET1E,KAAK2E,SAASd,IAAUA,EAAMe,SAASF,gBASlDG,iBAAQhB,UAEG,IAAIiB,OAAO,6BAA6BC,KAAKC,OAAOnB,GAAOoB,4BAStEC,iBAAQrB,SAEG,CAAC,EAAG,KAAK,EAAO,SAASX,SAASW,gBAS7CsB,cAAKtB,EAAOuB,UAERA,EAA6B,iBAAZA,EACPA,EAAQpC,MAAM,KACdoC,GAEKlC,SAASW,gBAS5BrD,mBAAUqD,UAECwB,OAAO7E,UAAUqD,IAAUT,SAASS,GAAOQ,aAAeR,EAAMQ,wBAS3EiB,gBAAOzB,aAGqC,iBAAtB0B,KAAKC,MAAM3B,GAC3B,MAAO4B,UACE,gBAUfC,mBAAU7B,EAAO8B,UAEb9B,EAAyB,iBAAVA,EAAqBA,EAAM+B,OAAS/B,EAE5CgC,WAAWhC,IAAU8B,eAShCG,mBAAUjC,EAAO8B,UAEb9B,EAAyB,iBAAVA,EAAqBA,EAAM+B,OAAS/B,EAE5CgC,WAAWhC,IAAU8B,eAShCI,iBAAQlC,EAAOuB,UAEFpF,KAAKmF,KAAKtB,EAAOuB,gBAS9BY,mBAAUnC,UAEGU,MAAMsB,WAAWhC,KAAWoC,SAASpC,gBASlDqC,oBAAWrC,SAEA,CAAC,UAAMf,EAAW,IAAII,SAASW,gBAS1CsC,sBAAatC,EAAOuC,UAET,IAAItB,OAAOsB,GAAYrB,KAAKC,OAAOnB,GAAOoB,4BASrDoB,oBAAWxC,UAEE7D,KAAKkG,WAAWrC,gBAS7ByC,gBAAOzC,EAAO9B,UAEH8B,GAAS9B,eASpBwE,wBAAe1C,EAAOa,UAEX1E,KAAK2E,SAASd,IAAUA,EAAM2C,WAAW9B,gBASpDC,kBAASd,SAEmB,iBAAVA,eASlB4C,kBAAS5C,SAEE,CAAC,EAAG,KAAK,EAAM,QAAQX,SAASW,gBAS3C6C,eAAM7C,UAEK,IAAIiB,OAAO,yKACZC,KAAKC,OAAOnB,GAAOoB,4BAS7B0B,gBAAO9C,UAEI,IAAIiB,OAAO,6EACZC,KAAKC,OAAOnB,GAAOoB,4BAS7B2B,YAAG/C,EAAOgD,qBAAQ,KAERA,EAAMjB,OAAQ,OAAO,KAEV,aAAbiB,EAAM,IAAqB7G,KAAKkG,WAAWrC,GAAQ,OAAO,MAEzDiD,IAAIC,KAASF,KAEO,aAAjBA,EAAME,KAKG/G,WAHF6G,EAAME,GAAO/D,MAAM,KAAK,GAAG,GAAGP,cAC9BoE,EAAME,GAAO/D,MAAM,KAAK,GAAGN,MAAM,KAEbsE,MAAMhH,KAAM,CAAC6D,EAAOgD,EAAME,GAAO/D,MAAM,KAAK,KAE7D,OAAO6D,EAAME,UAIxB,eASXE,0BAAiBlH,QAERA,SAAWA,GAWxBmH,OAAOrH,OAAS,IAAIA"}
\ No newline at end of file
diff --git a/package.json b/package.json
index b00fb48..1ba9ab5 100644
--- a/package.json
+++ b/package.json
@@ -1,12 +1,12 @@
 {
     "name": "@kingshott/iodine",
-    "version": "3.0.2",
+    "version": "3.0.3",
     "description": "A micro client-side validation library",
     "repository": {
         "type": "git",
         "url": "https://github.com/mattkingshott/iodine.git"
     },
-	"keywords": [
+    "keywords": [
         "iodine",
         "validation",
         "data",
@@ -14,7 +14,7 @@
     ],
     "scripts": {
         "build": "microbundle",
-		"watch": "microbundle watch",
+        "watch": "microbundle watch",
         "test": "jest"
     },
     "main": "dist/iodine.min.js",
diff --git a/resources/version.svg b/resources/version.svg
index e7dd202..3b7f1c3 100644
--- a/resources/version.svg
+++ b/resources/version.svg
@@ -14,7 +14,7 @@
     <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
         <text x="23.5" y="15" fill="#010101" fill-opacity=".3">stable</text>
         <text x="23.5" y="14">stable</text>
-        <text x="67.5" y="15" fill="#010101" fill-opacity=".3">v3.0.2</text>
-        <text x="67.5" y="14">v3.0.2</text>
+        <text x="67.5" y="15" fill="#010101" fill-opacity=".3">v3.0.3</text>
+        <text x="67.5" y="14">v3.0.3</text>
     </g>
 </svg>
\ No newline at end of file
diff --git a/src/iodine.js b/src/iodine.js
index d8aa4c4..c8c616e 100644
--- a/src/iodine.js
+++ b/src/iodine.js
@@ -10,464 +10,456 @@
 class Iodine
 {
 
-	/**
-	 * Constructor.
-	 *
-	 **/
-	constructor()
-	{
-		this.messages = this._defaultMessages();
-	}
-
-
-
-	/**
-	 * @internal.
-	 *
-	 **/
-	_dateCompare(first, second, type, equals = false)
-	{
-		if (! this.isDate(first)) return false;
-
-		if (! this.isDate(second) && ! this.isInteger(second)) return false;
-
-		second = typeof second === 'number' ? second : second.getTime();
-
-		if (type === 'less' && equals) return first.getTime() <= second;
-		if (type === 'less' && ! equals) return first.getTime() < second;
-		if (type === 'more' && equals) return first.getTime() >= second;
-		if (type === 'more' && ! equals) return first.getTime() > second;
-	}
-
-
-
-	/**
-	 * @internal.
-	 *
-	 **/
-	_defaultMessages()
-	{
-		return {
-			after         : `The date must be after: '[PARAM]'`,
-			afterOrEqual  : `The date must be after or equal to: '[PARAM]'`,
-			array         : `Value must be an array`,
-			before        : `The date must be before: '[PARAM]'`,
-			beforeOrEqual : `The date must be before or equal to: '[PARAM]'`,
-			boolean       : `Value must be true or false`,
-			date          : `Value must be a date`,
-			different     : `Value must be different to '[PARAM]'`,
-			endingWith    : `Value must end with '[PARAM]'`,
-			email         : `Value must be a valid email address`,
-			falsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,
-			in     		  : `Value must be one of the following options: [PARAM]`,
-			integer       : `Value must be an integer`,
-			json          : `Value must be a parsable JSON object string`,
-			maximum       : `Value must not be greater than '[PARAM]' in size or character length`,
-			minimum       : `Value must not be less than '[PARAM]' in size or character length`,
-			notIn         : `Value must not be one of the following options: [PARAM]`,
-			numeric       : `Value must be numeric`,
-			optional      : `Value is optional`,
-			regexMatch    : `Value must satisify the regular expression: [PARAM]`,
-			required      : `Value must be present`,
-			same          : `Value must be '[PARAM]'`,
-			startingWith  : `Value must start with '[PARAM]'`,
-			string        : `Value must be a string`,
-			truthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,
-			url           : `Value must be a valid url`,
-			uuid          : `Value must be a valid UUID`,
-		};
-	}
-
-
-
-	/**
-	 * Attach a custom validation rule to the library.
-	 *
-	 **/
-	addRule(name, closure)
-	{
-		Iodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;
-	}
-
-
-
-	/**
-	 * Retrieve an error message for the given rule.
-	 *
-	 **/
-	getErrorMessage(rule, arg = undefined)
-	{
-		let key   = rule.split(':')[0];
-		let param = arg || rule.split(':')[1];
-
-		if (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {
-			param = new Date(parseInt(param)).toLocaleTimeString(undefined, {
-				year: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'
-			});
-		}
-
-		return [null, undefined].includes(param)
-			 ? this.messages[key]
-			 : this.messages[key].replace("[PARAM]", param);
-	}
-
-
-
-	/**
-	 * Determine if the given date is after another given date.
-	 *
-	 **/
-	isAfter(value, after)
-	{
-		return this._dateCompare(value, after, 'more', false);
-	}
-
-
-
-	/**
-	 * Determine if the given date is after or equal to another given date.
-	 *
-	 **/
-	isAfterOrEqual(value, after)
-	{
-		return this._dateCompare(value, after, 'more', true);
-	}
-
-
-
-	/**
-	 * Determine if the given value is an array.
-	 *
-	 **/
-	isArray(value)
-	{
-		return Array.isArray(value);
-	}
-
-
-
-	/**
-	 * Determine if the given date is before another given date.
-	 *
-	 **/
-	isBefore(value, before)
-	{
-		return this._dateCompare(value, before, 'less', false);
-	}
-
-
-
-	/**
-	 * Determine if the given date is before or equal to another given date.
-	 *
-	 **/
-	isBeforeOrEqual(value, before)
-	{
-		return this._dateCompare(value, before, 'less', true);
-	}
+    /**
+     * Constructor.
+     *
+     **/
+    constructor()
+    {
+        this.messages = this._defaultMessages();
+    }
+
+
+
+    /**
+     * @internal.
+     *
+     **/
+    _dateCompare(first, second, type, equals = false)
+    {
+        if (! this.isDate(first)) return false;
+
+        if (! this.isDate(second) && ! this.isInteger(second)) return false;
+
+        second = typeof second === 'number' ? second : second.getTime();
+
+        if (type === 'less' && equals) return first.getTime() <= second;
+        if (type === 'less' && ! equals) return first.getTime() < second;
+        if (type === 'more' && equals) return first.getTime() >= second;
+        if (type === 'more' && ! equals) return first.getTime() > second;
+    }
+
+
+
+    /**
+     * @internal.
+     *
+     **/
+    _defaultMessages()
+    {
+        return {
+            after         : `The date must be after: '[PARAM]'`,
+            afterOrEqual  : `The date must be after or equal to: '[PARAM]'`,
+            array         : `Value must be an array`,
+            before        : `The date must be before: '[PARAM]'`,
+            beforeOrEqual : `The date must be before or equal to: '[PARAM]'`,
+            boolean       : `Value must be true or false`,
+            date          : `Value must be a date`,
+            different     : `Value must be different to '[PARAM]'`,
+            endingWith    : `Value must end with '[PARAM]'`,
+            email         : `Value must be a valid email address`,
+            falsy         : `Value must be a falsy value (false, 'false', 0 or '0')`,
+            in               : `Value must be one of the following options: [PARAM]`,
+            integer       : `Value must be an integer`,
+            json          : `Value must be a parsable JSON object string`,
+            maximum       : `Value must not be greater than '[PARAM]' in size or character length`,
+            minimum       : `Value must not be less than '[PARAM]' in size or character length`,
+            notIn         : `Value must not be one of the following options: [PARAM]`,
+            numeric       : `Value must be numeric`,
+            optional      : `Value is optional`,
+            regexMatch    : `Value must satisify the regular expression: [PARAM]`,
+            required      : `Value must be present`,
+            same          : `Value must be '[PARAM]'`,
+            startingWith  : `Value must start with '[PARAM]'`,
+            string        : `Value must be a string`,
+            truthy        : `Value must be a truthy value (true, 'true', 1 or '1')`,
+            url           : `Value must be a valid url`,
+            uuid          : `Value must be a valid UUID`,
+        };
+    }
+
+
+
+    /**
+     * Attach a custom validation rule to the library.
+     *
+     **/
+    addRule(name, closure)
+    {
+        Iodine.prototype[`is${name[0].toUpperCase()}${name.slice(1)}`] = closure;
+    }
+
+
+
+    /**
+     * Retrieve an error message for the given rule.
+     *
+     **/
+    getErrorMessage(rule, arg = undefined)
+    {
+        let key   = rule.split(':')[0];
+        let param = arg || rule.split(':')[1];
+
+        if (['after', 'afterOrEqual', 'before', 'beforeOrEqual'].includes(key)) {
+            param = new Date(parseInt(param)).toLocaleTimeString(undefined, {
+                year: 'numeric', month: 'short', day: 'numeric', hour: '2-digit', minute: 'numeric'
+            });
+        }
+
+        return [null, undefined].includes(param)
+             ? this.messages[key]
+             : this.messages[key].replace('[PARAM]', param);
+    }
+
+
+
+    /**
+     * Determine if the given date is after another given date.
+     *
+     **/
+    isAfter(value, after)
+    {
+        return this._dateCompare(value, after, 'more', false);
+    }
+
+
+
+    /**
+     * Determine if the given date is after or equal to another given date.
+     *
+     **/
+    isAfterOrEqual(value, after)
+    {
+        return this._dateCompare(value, after, 'more', true);
+    }
+
+
+
+    /**
+     * Determine if the given value is an array.
+     *
+     **/
+    isArray(value)
+    {
+        return Array.isArray(value);
+    }
+
+
+
+    /**
+     * Determine if the given date is before another given date.
+     *
+     **/
+    isBefore(value, before)
+    {
+        return this._dateCompare(value, before, 'less', false);
+    }
+
+
+
+    /**
+     * Determine if the given date is before or equal to another given date.
+     *
+     **/
+    isBeforeOrEqual(value, before)
+    {
+        return this._dateCompare(value, before, 'less', true);
+    }
 
 
 
-	/**
-	 * Determine if the given value is a boolean.
-	 *
-	 **/
-	isBoolean(value)
-	{
-		return [true, false].includes(value);
-	}
+    /**
+     * Determine if the given value is a boolean.
+     *
+     **/
+    isBoolean(value)
+    {
+        return [true, false].includes(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value is a date object.
-	 *
-	 **/
-	isDate(value)
-	{
-		return value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);
-	}
+    /**
+     * Determine if the given value is a date object.
+     *
+     **/
+    isDate(value)
+    {
+        return value && Object.prototype.toString.call(value) === '[object Date]' && ! isNaN(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value is different to another given value.
-	 *
-	 **/
-	isDifferent(value, different)
-	{
-		return value != different;
-	}
+    /**
+     * Determine if the given value is different to another given value.
+     *
+     **/
+    isDifferent(value, different)
+    {
+        return value != different;
+    }
 
 
 
-	/**
-	 * Determine if the given value ends with another given value.
-	 *
-	 **/
-	isEndingWith(value, sub)
-	{
-		return this.isString(value) && value.endsWith(sub);
-	}
+    /**
+     * Determine if the given value ends with another given value.
+     *
+     **/
+    isEndingWith(value, sub)
+    {
+        return this.isString(value) && value.endsWith(sub);
+    }
 
 
 
-	/**
-	 * Determine if the given value is a valid email address.
-	 *
-	 **/
-	isEmail(value)
-	{
-		return new RegExp('^\\S+@\\S+[\\.][0-9a-z]+$').test(String(value).toLowerCase());
-	}
+    /**
+     * Determine if the given value is a valid email address.
+     *
+     **/
+    isEmail(value)
+    {
+        return new RegExp('^\\S+@\\S+[\\.][0-9a-z]+$').test(String(value).toLowerCase());
+    }
 
 
 
-	/**
-	 * Determine if the given value is falsy.
-	 *
-	 **/
-	isFalsy(value)
-	{
-		return [0, '0', false, 'false'].includes(value);
-	}
+    /**
+     * Determine if the given value is falsy.
+     *
+     **/
+    isFalsy(value)
+    {
+        return [0, '0', false, 'false'].includes(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value is within the given array of options.
-	 *
-	 **/
-	isIn(value, options)
-	{
-		options = typeof options === 'string'
-				? options.split(",")
-				: options;
+    /**
+     * Determine if the given value is within the given array of options.
+     *
+     **/
+    isIn(value, options)
+    {
+        options = typeof options === 'string'
+                ? options.split(',')
+                : options;
 
-		return options.includes(value);
-	}
+        return options.includes(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value is an integer.
-	 *
-	 **/
-	isInteger(value)
-	{
-		return Number.isInteger(value) && parseInt(value).toString() === value.toString();
-	}
+    /**
+     * Determine if the given value is an integer.
+     *
+     **/
+    isInteger(value)
+    {
+        return Number.isInteger(value) && parseInt(value).toString() === value.toString();
+    }
 
 
 
-	/**
-	 * Determine if the given value is a JSON string.
-	 *
-	 **/
-	isJson(value)
-	{
-		try {
-        	return typeof JSON.parse(value) === 'object';
-		} catch (e) {
-			return false;
-		}
-	}
+    /**
+     * Determine if the given value is a JSON string.
+     *
+     **/
+    isJson(value)
+    {
+        try {
+            return typeof JSON.parse(value) === 'object';
+        } catch (e) {
+            return false;
+        }
+    }
 
 
 
-	/**
-	 * Determine if the given value meets the given maximum limit.
-	 *
-	 **/
-	isMaximum(value, limit)
-	{
-		value = typeof value === 'string' ? value.length : value;
+    /**
+     * Determine if the given value meets the given maximum limit.
+     *
+     **/
+    isMaximum(value, limit)
+    {
+        value = typeof value === 'string' ? value.length : value;
 
-		return parseFloat(value) <= limit;
-	}
+        return parseFloat(value) <= limit;
+    }
 
 
 
-	/**
-	 * Determine if the given value meets the given minimum limit.
-	 *
-	 **/
-	isMinimum(value, limit)
-	{
-		value = typeof value === 'string' ? value.length : value;
+    /**
+     * Determine if the given value meets the given minimum limit.
+     *
+     **/
+    isMinimum(value, limit)
+    {
+        value = typeof value === 'string' ? value.length : value;
 
-		return parseFloat(value) >= limit;
-	}
+        return parseFloat(value) >= limit;
+    }
 
 
 
-	/**
-	 * Determine if the given value is not within the given array of options.
-	 *
-	 **/
-	isNotIn(value, options)
-	{
-		return ! this.isIn(value, options);
-	}
+    /**
+     * Determine if the given value is not within the given array of options.
+     *
+     **/
+    isNotIn(value, options)
+    {
+        return ! this.isIn(value, options);
+    }
 
 
 
-	/**
-	 * Determine if the given value is numeric (an integer or a float).
-	 *
-	 **/
-	isNumeric(value)
-	{
-		return ! isNaN(parseFloat(value)) && isFinite(value);
-	}
+    /**
+     * Determine if the given value is numeric (an integer or a float).
+     *
+     **/
+    isNumeric(value)
+    {
+        return ! isNaN(parseFloat(value)) && isFinite(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value is optional.
-	 *
-	 **/
-	isOptional(value)
-	{
-		return [null, undefined, ''].includes(value);
-	}
+    /**
+     * Determine if the given value is optional.
+     *
+     **/
+    isOptional(value)
+    {
+        return [null, undefined, ''].includes(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value satisifies the given regular expression.
-	 *
-	 **/
-	isRegexMatch(value, expression)
-	{
-		return new RegExp(expression).test(String(value).toLowerCase());
-	}
+    /**
+     * Determine if the given value satisifies the given regular expression.
+     *
+     **/
+    isRegexMatch(value, expression)
+    {
+        return new RegExp(expression).test(String(value).toLowerCase());
+    }
 
 
 
-	/**
-	 * Determine if the given value is present.
-	 *
-	 **/
-	isRequired(value)
-	{
-		return ! this.isOptional(value);
-	}
+    /**
+     * Determine if the given value is present.
+     *
+     **/
+    isRequired(value)
+    {
+        return ! this.isOptional(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value is the same as another given value.
-	 *
-	 **/
-	isSame(value, same)
-	{
-		return value == same;
-	}
+    /**
+     * Determine if the given value is the same as another given value.
+     *
+     **/
+    isSame(value, same)
+    {
+        return value == same;
+    }
 
 
 
-	/**
-	 * Determine if the given value starts with another given value.
-	 *
-	 **/
-	isStartingWith(value, sub)
-	{
-		return this.isString(value) && value.startsWith(sub);
-	}
+    /**
+     * Determine if the given value starts with another given value.
+     *
+     **/
+    isStartingWith(value, sub)
+    {
+        return this.isString(value) && value.startsWith(sub);
+    }
 
 
 
-	/**
-	 * Determine if the given value is a string.
-	 *
-	 **/
-	isString(value)
-	{
-		return typeof value === 'string';
-	}
+    /**
+     * Determine if the given value is a string.
+     *
+     **/
+    isString(value)
+    {
+        return typeof value === 'string';
+    }
 
 
 
-	/**
-	 * Determine if the given value is truthy.
-	 *
-	 **/
-	isTruthy(value)
-	{
-		return [1, '1', true, 'true'].includes(value);
-	}
+    /**
+     * Determine if the given value is truthy.
+     *
+     **/
+    isTruthy(value)
+    {
+        return [1, '1', true, 'true'].includes(value);
+    }
 
 
 
-	/**
-	 * Determine if the given value is a valid URL.
-	 *
-	 **/
-	isUrl(value)
-	{
-		return new RegExp('^(https?:\\/\\/)?((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|((\\d{1,3}\\.){3}\\d{1,3}))(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*(\\?[;&a-z\\d%_.~+=-]*)?(\\#[-a-z\\d_]*)?$')
-			 .test(String(value).toLowerCase());
-	}
+    /**
+     * Determine if the given value is a valid URL.
+     *
+     **/
+    isUrl(value)
+    {
+        return new RegExp('^(https?:\\/\\/)?((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|((\\d{1,3}\\.){3}\\d{1,3}))(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*(\\?[;&a-z\\d%_.~+=-]*)?(\\#[-a-z\\d_]*)?$')
+             .test(String(value).toLowerCase());
+    }
 
 
 
-	/**
-	 * Determine if the given value is a valid UUID.
-	 *
-	 **/
-	isUuid(value)
-	{
-		return new RegExp('^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$')
-			 .test(String(value).toLowerCase());
-	}
+    /**
+     * Determine if the given value is a valid UUID.
+     *
+     **/
+    isUuid(value)
+    {
+        return new RegExp('^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$')
+             .test(String(value).toLowerCase());
+    }
 
 
 
-	/**
-	 * Determine whether the given value meets the given rules.
-	 *
-	 **/
-	is(value, rules = [])
-	{
-		// Check if no rules were specified
-		if (! rules.length) return true;
+    /**
+     * Determine whether the given value meets the given rules.
+     *
+     **/
+    is(value, rules = [])
+    {
+        if (! rules.length) return true;
 
-		// Check for an optional value
-		if (rules[0] === 'optional' && this.isOptional(value)) return true;
+        if (rules[0] === 'optional' && this.isOptional(value)) return true;
 
-		// Iterate through the rules
-		for (let index in rules) {
+        for (let index in rules) {
 
-			// Ignore optional rules
-			if (rules[index] === 'optional') continue;
+            if (rules[index] === 'optional') continue;
 
-			// Determine the method to use
-			let rule = rules[index].split(':')[0][0].toUpperCase()
-					 + rules[index].split(':')[0].slice(1);
+            let rule = rules[index].split(':')[0][0].toUpperCase()
+                     + rules[index].split(':')[0].slice(1);
 
-			// Validate the value against the method
-			let result = this[`is${rule}`].apply(this, [value, rules[index].split(':')[1]]);
+            let result = this[`is${rule}`].apply(this, [value, rules[index].split(':')[1]]);
 
-			// Check if the value failed validation
-			if (! result) return rules[index];
+            if (! result) return rules[index];
 
-		}
+        }
 
-		// Otherwise, the value is valid
-		return true;
-	}
+        return true;
+    }
 
 
 
-	/**
-	 * Replace the default error messages with a new set.
-	 *
-	 **/
-	setErrorMessages(messages)
-	{
-		this.messages = messages;
-	}
+    /**
+     * Replace the default error messages with a new set.
+     *
+     **/
+    setErrorMessages(messages)
+    {
+        this.messages = messages;
+    }
 
 }
 
diff --git a/tests/test.js b/tests/test.js
index 6832ee8..43dedc1 100644
--- a/tests/test.js
+++ b/tests/test.js
@@ -1,4 +1,3 @@
-// Import Iodine
 import '../dist/iodine.min.js';
 
 
@@ -8,7 +7,7 @@ import '../dist/iodine.min.js';
  *
  **/
 test('it validates after date values', () => {
-	let year = new Date().getFullYear();
+    let year = new Date().getFullYear();
     expect(Iodine.isAfter(new Date(year + 1, 12, 18), new Date(year, 12, 18))).toBe(true);
     expect(Iodine.isAfter(new Date(year + 1, 12, 17), Date.now())).toBe(true);
     expect(Iodine.isAfter(new Date(`December 18, ${year + 1} 03:24:00`), new Date(year, 12, 18))).toBe(true);
@@ -25,7 +24,7 @@ test('it validates after date values', () => {
  *
  **/
 test('it validates after or equal date values', () => {
-	let year = new Date().getFullYear();
+    let year = new Date().getFullYear();
     expect(Iodine.isAfterOrEqual(new Date(year + 1, 12, 18), new Date(year, 12, 18))).toBe(true);
     expect(Iodine.isAfterOrEqual(new Date(year + 1, 12, 17), Date.now())).toBe(true);
     expect(Iodine.isAfterOrEqual(new Date(`December 18, ${year + 1} 03:24:00`), new Date(year, 12, 18))).toBe(true);
@@ -43,7 +42,7 @@ test('it validates after or equal date values', () => {
  *
  **/
 test('it validates before date values', () => {
-	let year = new Date().getFullYear();
+    let year = new Date().getFullYear();
     expect(Iodine.isBefore(new Date(year - 1, 12, 18), new Date(year, 12, 18))).toBe(true);
     expect(Iodine.isBefore(new Date(year - 1, 12, 17), Date.now())).toBe(true);
     expect(Iodine.isBefore(new Date(`December 18, ${year - 1} 03:24:00`), new Date(year, 12, 18))).toBe(true);
@@ -60,7 +59,7 @@ test('it validates before date values', () => {
  *
  **/
 test('it validates before or equal date values', () => {
-	let year = new Date().getFullYear();
+    let year = new Date().getFullYear();
     expect(Iodine.isBeforeOrEqual(new Date(year - 1, 12, 18), new Date(year, 12, 18))).toBe(true);
     expect(Iodine.isBeforeOrEqual(new Date(year - 1, 12, 17), Date.now())).toBe(true);
     expect(Iodine.isBeforeOrEqual(new Date(`December 18, ${year - 1} 03:24:00`), new Date(year, 12, 18))).toBe(true);
@@ -398,7 +397,7 @@ test('it validates values against multiple rules', () => {
  *
  **/
 test('it retrieves formatted error messages for rules', () => {
-	let time = Date.UTC(2020, 4, 2, 3, 17, 0);
+    let time = Date.UTC(2020, 4, 2, 3, 17, 0);
     expect(Iodine.getErrorMessage('array')).toBe('Value must be an array');
     expect(Iodine.getErrorMessage('endingWith')).toBe(`Value must end with '[PARAM]'`);
     expect(Iodine.getErrorMessage('endingWith:world')).toBe(`Value must end with 'world'`);
@@ -414,10 +413,10 @@ test('it retrieves formatted error messages for rules', () => {
  *
  **/
 test('it can replace the default error messages', () => {
-	Iodine.setErrorMessages({ array : 'Hello world', endingWith : 'Hello, [PARAM]' });
+    Iodine.setErrorMessages({ array : 'Hello world', endingWith : 'Hello, [PARAM]' });
     expect(Iodine.getErrorMessage('array')).toBe('Hello world');
     expect(Iodine.getErrorMessage('endingWith:John')).toBe('Hello, John');
-    expect(Iodine.getErrorMessage('endingWith', "John")).toBe('Hello, John');
+    expect(Iodine.getErrorMessage('endingWith', 'John')).toBe('Hello, John');
 });
 
 
@@ -427,14 +426,14 @@ test('it can replace the default error messages', () => {
  *
  **/
 test('it can add simple custom rules', () => {
-	Iodine.addRule('lowerCase', (value) => value === value.toLowerCase());
-	Iodine.setErrorMessages({ lowerCase : 'Value must be in lower case' });
+    Iodine.addRule('lowerCase', (value) => value === value.toLowerCase());
+    Iodine.setErrorMessages({ lowerCase : 'Value must be in lower case' });
     expect(Iodine.isLowerCase('hello')).toBe(true);
     expect(Iodine.isLowerCase('Hello')).toBe(false);
     expect(Iodine.isLowerCase('HELLO')).toBe(false);
-	expect(Iodine.is('hello', ['required', 'lowerCase'])).toBe(true);
-	expect(Iodine.is('Hello', ['required', 'lowerCase'])).toBe('lowerCase');
-	expect(Iodine.is('HELLO', ['required', 'lowerCase'])).toBe('lowerCase');
+    expect(Iodine.is('hello', ['required', 'lowerCase'])).toBe(true);
+    expect(Iodine.is('Hello', ['required', 'lowerCase'])).toBe('lowerCase');
+    expect(Iodine.is('HELLO', ['required', 'lowerCase'])).toBe('lowerCase');
     expect(Iodine.getErrorMessage('lowerCase')).toBe('Value must be in lower case');
 });
 
@@ -445,14 +444,14 @@ test('it can add simple custom rules', () => {
  *
  **/
 test('it can add advanced custom rules', () => {
-	Iodine.addRule('equals', (value, param) => value == param);
-	Iodine.setErrorMessages({ equals : `Value must be equal to '[PARAM]'` });
+    Iodine.addRule('equals', (value, param) => value == param);
+    Iodine.setErrorMessages({ equals : `Value must be equal to '[PARAM]'` });
     expect(Iodine.isEquals(1, 1)).toBe(true);
     expect(Iodine.isEquals(1, 2)).toBe(false);
     expect(Iodine.isEquals(1, 3)).toBe(false);
-	expect(Iodine.is(1, ['required', 'equals:1'])).toBe(true);
-	expect(Iodine.is(1, ['required', 'equals:2'])).toBe('equals:2');
-	expect(Iodine.is(1, ['required', 'equals:3'])).toBe('equals:3');
+    expect(Iodine.is(1, ['required', 'equals:1'])).toBe(true);
+    expect(Iodine.is(1, ['required', 'equals:2'])).toBe('equals:2');
+    expect(Iodine.is(1, ['required', 'equals:3'])).toBe('equals:3');
     expect(Iodine.getErrorMessage('equals:2')).toBe(`Value must be equal to '2'`);
     expect(Iodine.getErrorMessage('equals', 2)).toBe(`Value must be equal to '2'`);
 });
\ No newline at end of file