Validator - JQuery validation plugin for forms

Validator is a JQuery validation plugin for forms. It can validate text, textarea, password, checkbox and select elements. With these different elements Validator supports: required, dependency on checkbox, min/max length, email, number, digits and some positioning of error messages.

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Source: github.com

1. INCLUDE JS FILES

<script src="jquery-1.11.0.min.js"></script>
<script src="fm.validator.jquery.js"></script>

2. HTML

Here is an example of an textbox being required and the content being required to be between 3 and 12 characters.

<form method="post" class="validator">
  <input type="text" data-required data-min="3" data-max="12">
</form>

3. JAVASCRIPT

By default when initialized, the plugin will look for any form that contain the class validator, add itself to the submit event of the form, and then look for validator html5 data attributes that indicate what and how it the elements in the form should be validated. But you can also validate a form manually, by running the Validator.validate function. Here is an example:

if (Validator.validate('#someForm')) {
    alert('The form is valid, awesome!');
    return true;
} else {
    alert('The form is NOT valid!');
}

4. SUPPORTED VALIDATIONS

Text inputs:

Password inputs:

Checkbox inputs:

Select inputs:

Textareas:

5. GLOBAL OPTIONS

Global options like language, elementErrorClass and language translations, can be set in the global options.

Here is an example. Setting language to danish, and changing the name of the error class applied to the input elements:

Validator.language = 'da';
Validator.elementErrorClass = 'fejl';

6. DOM MANGLING

If there is a validation error, the plugin generates a div element before (or after) the input element, containing the error message in the chosen language, and also adds the class validator-error. Here is an example of what it would look like:

<form method="post" class="validator">
    <div class="validator-error">Field is required</div>
    <input type="text" data-required data-min="3" data-max="12" class="error">
</form>

As you can see, a class will also be added to the input element itself, which is error by default, but can be set in the global options.

7. LOCALIZATION

You can also add a new language to the plugin at runtime:

Validator.languages.fr: {
    textbox: {
        required: 'Le field is le`required',
        min: '...', // and so on
    }
}
Validator.language = 'fr';

Here is an example of a whole language translation

Validator.languages.en: {
    textbox: {
        required: 'This field is required',
        min: 'This field must contain at least {characters} characters',
        max: 'This field must not contain more than {characters} characters',
        email: 'Email is not valid',
        url: 'Website is not valid',
        number: 'Only numbers',
        digits: 'Only numbers'
    },
    password: {
        required: 'This field is required',
        min: 'This field must contain at least {characters} characters',
        max: 'This field must not contain more than {characters} characters',
        match: 'The passwords do not match'
    },
    radio: {
    },
    checkbox: {
        required: 'This checkbox is required'
    },
    select: {
        required: 'Choose a field from the list'
    },
    textarea: {
        required: 'This field is required',
        min: 'This field must contain at least {characters} characters',
        max: 'This field must not contain more than {characters} characters',
        url: 'Website is not valid'
    }
}