Fix name collision. Do not rely on Object.assign.

lib/config.js

@@ -1,4 +1,5 @@
 import {capitalize} from './util'
+import assign       from 'object-assign'
 
 const defaultConfig = {
   formatErrors: (errors) => {
@@ -25,10 +26,10 @@ const defaultConfig = {
   inputContainerClassName: ''
 }
 
-const config = Object.assign({}, defaultConfig)
+const config = assign({}, defaultConfig)
 
 export function restore() {
-  Object.assign(config, defaultConfig)
+  assign(config, defaultConfig)
 }
 
 export {defaultConfig as defaultConfig}

lib/form-builder.js

@@ -2,6 +2,7 @@ import assert       from 'assert'
 import Form         from './form'
 import BaseInput    from './inputs/base'
 import inputFactory from './input-factory'
+import assign       from 'object-assign'
 
 export default class FormBuilder {
   constructor(name) {
@@ -34,7 +35,7 @@ export default class FormBuilder {
   }
 
   build(config = {}) {
-    return new Form(Object.assign({
+    return new Form(assign({
       model: this._model,
       inputs: this._inputs,
       name: this._name

lib/form.js

@@ -1,5 +1,6 @@
-import riot from 'riot'
+import riot   from 'riot'
 import assert from 'assert'
+import assign from 'object-assign'
 
 export default class Form {
   constructor(config = {}) {
@@ -35,7 +36,7 @@ export default class Form {
     if (this.config.noClone) {
       this._model = model
     } else {
-      this._model = Object.assign({}, model)
+      this._model = assign({}, model)
     }
     this._setInputValues()
   }

lib/index.js

@@ -1,3 +1,5 @@
+import assign       from 'object-assign'
+
 import config       from './config'
 import Form         from './form'
 import FormBuilder  from './form-builder'
@@ -12,7 +14,7 @@ for (const input of Object.keys(inputs)) {
 }
 
 export function configure(conf) {
-  Object.assign(config, conf)
+  assign(config, conf)
 }
 
 export {Form as Form}

lib/inputs/base.js

@@ -1,6 +1,7 @@
-import assert from 'assert'
-import riot   from 'riot'
-import config from '../config'
+import assert       from 'assert'
+import riot         from 'riot'
+import assign       from 'object-assign'
+import globalConfig from '../config'
 
 export default class BaseInput {
   constructor(config = {}) {
@@ -88,16 +89,16 @@ export default class BaseInput {
   }
 
   get defaultProcess() {
-    return config.processValue
+    return globalConfig.processValue
   }
 
   get defaultFormatErrors() {
-    return config.formatErrors
+    return globalConfig.formatErrors
   }
 }
 
 BaseInput.extend = function (props) {
   class Input extends BaseInput {}
-  Object.assign(Input.prototype, props)
+  assign(Input.prototype, props)
   return Input
 }

package.json

@@ -52,5 +52,8 @@
     "webdriverio": "^4.0.3",
     "webpack": "^1.12.14",
     "webpack-stream": "^3.1.0"
+  },
+  "dependencies": {
+    "object-assign": "^4.0.1"
   }
 }