validator-lite

Lightweight Form Validation (no dependencies)

Install

$ npm install --save validator-lite

Usage

<form id="demo">
  <div class="form-control">
    <label>Email Address</label>
    <input type="email" name="email">
  </div>
  <div class="form-control">
    <label>Password</label>
    <input id="pw" type="password" name="password1">
  </div>
  <div class="form-control">
    <label>Confirm Password</label>
    <input type="password" name="password2">
  </div>
  <button type="submit">Register</button>
</form>
 
<script src="validator.min.js"></script>
<script>
  var demo = document.getElementById('demo');
  var val = new Validator({
    form: demo,
    fieldClass: 'form-control',
    rules: {
      email: {
      	required: true,
      	message: 'You must enter an email',
      	test: 'email'
      },
      password1: {
      	required: true,
      	message: 'You must enter a password',
      	test: 'password'
      },
      password2: {
      	required: true,
      	test: 'equals'
      	message: 'Please confirm your password',
      	arg: function () {
          return demo.querySelector('input#pw').value;
      	}
      },
    },
    onFail: function () {
      alert('Please correct all errors!');
    },
    onPass: function (elem) {
      elem.reset();
      window.location.href = '/welcome';
    }
  });
</script> 
 
 

API

Validator([options], [tests]);

Add custom tests or override included defaults.

options.form

Type: Element
Default: null

Lorem ipsum.

options.rules

Type: Object
Default: {}

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options.errorClass

Type: String
Default: 'error'

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options.defaultMsg

Type: String
Default: 'Required'

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options.onFail

Type: Function
Default: noop

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options.onPass

Type: Function
Default: noop

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tests.email(val)

tests.password(val, arg)

tests.url(val)

tests.minLength(val, arg)

tests.maxLength(val, arg)

tests.btwLength(val, arg)

tests.equals(val, arg)

License

MIT © Luke Edwards