0.2.5 • Public • Published

jQuery strength bower NPM version Dependency Status prs-welcome

jQuery strength provides a toggle feature for password input fields that allows the user to view or asterisk the password. It also features a strength indicator to show how secure a users password is.

It base on Nando Vieira's password_strength which validates the strength of a password according to several rules.

Table of contents

Main files

├── jquery-strength.js
├── jquery-strength.es.js
├── jquery-strength.min.js
└── css/
    ├── strength.css
    └── strength.min.css

Quick start

Several quick start options are available:

Download the latest build

Install From Bower

bower install jquery-strength --save

Install From Npm

npm install jquery-strength --save

Install From Yarn

yarn add jquery-strength

Build From Source

If you want build from source:

git clone git@github.com:amazingSurge/jquery-strength.git
cd jquery-strength
npm install
npm install -g gulp-cli babel-cli
gulp build



jquery-strength requires the latest version of jQuery.


Including files:

<link rel="stylesheet" href="/path/to/strength.css">
<script src="/path/to/jquery.js"></script>
<script src="/path/to/jquery-strength.js"></script>

Required HTML structure

<input type="password" class="password-input form-control" name="password" value="" />


All you need to do is call the plugin on the element:

jQuery(function($) {


There are some example usages that you can look at to get started. They can be found in the examples folder.


jquery-strength can accept an options object to alter the way it behaves. You can see the default options by call $.strength.setDefaults(). The structure of an options object is as follows:

  namespace: 'strength',
  skin: null,

  showMeter: true,
  showToggle: true,

  usernameField: '',

  templates: {
    toggle: '<span class="input-group-addon"><input type="checkbox" class="{toggleClass}" title="Show/Hide Password" /></span>',
    meter: '<div class="{meterClass}">{score}</div>',
    score: '<span class="label {scoreClass}"></span>',
    main: '<div class="{containerClass}"><div class="input-group">{input}{toggle}</div>{meter}</div>'

  classes: {
    container: 'strength-container',
    status: 'strength-{status}',
    input: 'strength-input',
    toggle: 'strength-toggle',
    meter: 'strength-meter',
    score: 'strength-score'

  scoreLables: {
    empty: 'Empty',
    invalid: 'Invalid',
    weak: 'Weak',
    good: 'Good',
    strong: 'Strong'

  scoreClasses: {
    empty: '',
    invalid: 'label-danger',
    weak: 'label-warning',
    good: 'label-info',
    strong: 'label-success'

  emptyStatus: true,

  scoreCallback: null,
  statusCallback: null


Methods are called on strength instances through the strength method itself. You can also save the instances to variable for further use.

// call directly
// or
var api = $().data('strength');


Get the password score.

var score = $().strength('getScore');


Get the input status.

var status = $().strength('getStatus');


Toggle to show or hide the password.



Destroy the strength instance.



jquery-strength provides custom events for the plugin’s unique actions.

$('.the-element').on('strength::ready', function (e) {
  // on instance ready
Event Description
init Fires when the instance is setup for the first time.
ready Fires when the instance is ready for API use.
toggle Fired immediately when the toggle instance method has been called.
statusChange Fires when the input status changed.
check Fired immediately when the check instance method has been called.
destroy Fires when an instance is destroyed.

No conflict

If you have to use other plugin with the same namespace, just call the $.strength.noConflict method to revert to it.

<script src="other-plugin.js"></script>
<script src="jquery-strength.js"></script>
  // Code that uses other plugin's "$().strength" can follow here.

Browser support

Tested on all major browsers.

Safari Chrome Firefox Edge IE Opera
Latest ✓ Latest ✓ Latest ✓ Latest ✓ 9-11 ✓ Latest ✓

As a jQuery plugin, you also need to see the jQuery Browser Support.


Anyone and everyone is welcome to contribute. Please take a moment to review the guidelines for contributing. Make sure you're using the latest version of jquery-strength before submitting an issue. There are several ways to help out:


jquery-strength is built modularly and uses Gulp as a build system to build its distributable files. To install the necessary dependencies for the build system, please run:

npm install -g gulp
npm install -g babel-cli
npm install

Then you can generate new distributable files from the sources, using:

gulp build

More gulp tasks can be found here.


To see the list of recent changes, see Releases section.

Copyright and license

Copyright (C) 2016 amazingSurge.

Licensed under the LGPL license.

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