jQuery Simple Validator

Love HTML5 validation ❤️ and tired of validating forms with JavaScript 💩 then this is for you 🍻


How it works ?

  1. It picks up all the HTML5 validations in a form and makes them JavaScript driven for you
  2. Whenever a field is invalid it adds the class error to the field
  3. Whenever a field is valid it adds the class no-error to the field
  4. It adds a error message below the input field if it's invalid

Why should you use this ?

Super light weight 🎈

Libraries Size
jquery-validator ~ 75kb
jquery-simple-validator ~ 5kb

No need to write any f****** JavaScript 🔨 to get started!

The Main goal of jQuery simple validator is to keep it simple with just HTML5 validations thus you absolutely need no JavaScript to be written to start validating your forms

Getting Started

  1. Add jQuery and jQuery Simple Validator to your site
<script src="jquery-3.3.1.min.js"></script> <script src="jquery-simple-validator.min.js"></script>
  1. Add little styling to make things preety
input:not([type="file"]).error, textarea.error, select.error {   border: 1px solid red !important; }  input:not([type="file"]).no-error, textarea.no-error, select.no-error {   border: 1px solid green !important; }  div.error-field {   color: red;   font-size: small; }
  1. Add validate=true attribute to the forms you want to validate
<form validate="true">   ... </form>

Voila! now all your HTML5 validations will have a new look like a charm!

Supported Validations


Add the HTML5 attribute required to mandatory fields

<input type="text" name="username" required /> <input type="password" name="password" required /> <select required>   ... </select> <input type="file" name="propic" required /> <textarea required></textarea>


For the email type input fields email validations will be applied

<input type="email" />

Min Length and Max Length

Add the HTML5 attribute minlength, maxlength to specify the allowed minimum and maximum number of characters

<textarea minlength="10" maxlength="40"></textarea>


For the URL type input fields url validations will be applied

<input type="url" />


For the number type input fields the value will be validated to be a number

<input type="number" name="age " min="10" max="100" />
  • min: Minimum allowed number
  • max: Maximum allowed number


For the mobile type input fields 10 digit mobile number validations will be applied

<input type="mobile" />


If HTML5 attribute pattern is present in the input field it's value will be validated against it

<input name="country_code" pattern="^[A-Za-z]{3}$" />


Two input fields can be cross validated to have same value, for instance password and confirm password field

<input type="password" id="passwordInput" /> <input   type="password"   data-match="password"   data-match-field="#passwordInput" />
  • data-match: The word to be used in error message
  • data-match-field: The other field whoes value is to be compared with this input field

File Types

The file input field can be validated to have only specific file types

<input type="file" data-file-types="image/jpeg,image/png" />
  • data-file-types: Specifies the list of allowed mime types seperated by comma

File Sizes

The file input field can be validated to have a minimum and a maximum file size if needed

<input type="file" data-file-min-size="50kb" data-file-max-size="5mb" />
  • data-file-min-size: Specifies the allowed minimum size of file in kb, mb or gb
  • data-file-max-size: Specifies the allowed maximum size of file in kb, mb or gb

Custom error messages

You can add the attribute data-error to any input fields to customize the error message

Running test

I use jest for testing, to run tests

yarn test


  • Create a basic validator targeting HTML5 validators
  • Allow custom messages for specific validations
  • Create async validator
  • Create custom validator functions
  • Add test suites


MIT © Ameer Jhan