Validates that a value is a valid International Standard Serial Number (ISSN).
type: boolean default: true
Trim provided value.
type: boolean default: false
The validator will allow ISSN values to end with a lower case 'x' by default. When switching this to true,
the validator requires an upper case 'X'.
type: boolean default: false
The validator will allow non hyphenated ISSN values by default. When switching this to true, the validator requires a hyphenated ISSN value.
type: string default: This value is not a valid ISSN.
This is the message that will be shown if the value is not null.
| Parameter | Description |
|---|---|
| {{ value }} | The current (invalid) value |