jQuery Mobile converted to LESS
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jQuery Mobile LESS Version 1.3.0

This is a version of the jQuery Mobile project, converted to LESS. From the [official website] (http://jquerymobile .com):

A unified, HTML5-based user interface system for all popular mobile device platforms, built on the rock-solid jQuery and jQuery UI foundation. Its lightweight code is built with progressive enhancement, and has a flexible, easily themeable design.

jQuery Mobile 1.3 (1.3.0) works with versions of jQuery core from 1.7.0 to 1.8.2. You can find more information about how the library works, and what it is capable of, by reading the documentation.


  • More cross-browser. Using mixins.less file, we get maximum browser compatibility, for IE10, and rare browsers like Konquerer. Comes with PIE 2.0.1 beta so that you can get gradients and box-shadow in IE-7 and below.
  • LESS -- ftw. All the themes that you see in ThemeRoller have been taken and converted to variables. So you can edit any theme you want, all through LESS. Using variables.less, you get full control over the library and theme measurements.
  • Dynamicness... it owns. The LESS has been constructed based on basic measurements so that the measurements can "cascade" down. So you can adjust all the font sizes by simply changing @baseFontSize.
  • Tried and true techniques. Based off of the most common techniques for styling LESS, I took from Twitter Bootstrap, and other LESS frameworks to make a nice custom mixin file.
  • No images. Customizable icons with Icomoon. Instead of using images, we rely on the &:before and &:after pseudo-selectors to achieve a scalable design. It looks more crisp, and using Icomoon, you can easily customize, export, and import icon sets!


Currently, the library is shipped on the jQuery CDN/download as a single monolithic JavaScript file that depends on jQuery Core (not included) and a similarly bundled CSS file. For users we support the following build targets:

  • js - resolve dependencies, build, concat, and minify the JavaScript used for jQuery Mobile
  • css - resolve dependencies, build, concat, and minify all the css, just the structure css, and just the theme css
  • docs - build the js and css, and make the docs ready for static consumption
  • zip - package all the JavaScript and all the css into a zip archive

Note: don't use the CDN version of the CSS. The whole point of this repo is the modified CSS. Check this repo's CSS directory to find the file you want.

Download Builder

The easiest way to obtain a custom build is to use the download builder. With it, you can select the parts of the library you need and both the CSS and JavaScript dependencies will be resolved for you as a packaged/minified whole.


The js and css build targets require node.js and its packaged NPM package manager. For the other build targets, docs and zip, bash is also required. For more information on installing node please see its documentation. As for bash it's generally installed as the default shell in many POSIX compliant environments (OSX, Linux, BSD, etc).


With node installed you can run the js and css targets by simply issuing the following from the project root:

npm install
node node_modules/.bin/grunt js # or css

Note that if you have the appropriate version of grunt, our build tool, installed globally you can substitute grunt wherever you see node node_modules/.bin/grunt. For the remainder of the build documentation we will prefer the more concise grunt.

If you want to use the docs and zip targets you will need bash and they can be run with the following

grunt docs # or grunt zip

You can also compile the LESS using the grunt package I added. Make sure you install the dependencies though :)


As of version 1.1 the library uses dependency management in the JavaScript build by providing AMD modules which can be added or removed from the core mobile meta module js/jquery.mobile.js.

For example, if a user wished to exclude the form widgets to reduce the wire weight of their jQuery Mobile include they would first remove them from the meta module:

diff --git a/js/jquery.mobile.js b/js/jquery.mobile.js
index 6200fe6..3a4625c 100644
--- a/js/jquery.mobile.js
+++ b/js/jquery.mobile.js
@@ -19,12 +19,6 @@ define([
-       './jquery.mobile.forms.checkboxradio',
-       './jquery.mobile.forms.button',
-       './jquery.mobile.forms.slider',
-       './jquery.mobile.forms.textinput',
-       './jquery.mobile.forms.select.custom',
-       './jquery.mobile.forms.select',

And then run the build:

grunt js


The greatest thing about jQuery Mobile LESS is that themes can be easily customized and edited. To create a new theme:

  1. Copy the default folder from CSS/Themes to a new folder named after your new theme (eg, my-theme).

  2. Add customizations to the jquery.mobile.theme.css file.

  3. From the project root run the following grunt command:

     THEME=my-theme grunt css
  4. The output will be available in the $PROJECT_ROOT/compiled

Again this assumes the theme css files are available in the css/themes/$THEME/ directory relative to the project root, css/themes/my-theme/ in the example.


The root of the repository is also the root of the documentation and, along with the test suite, acts as the test bed for bug fixes and features. You'll need to set up a server and get the test suite running before you can contribute patches.


Most of the documentation and testing pages rely on PHP 5+, and as a result Apache and PHP are required for development. You can install them using one of the following methods:

  • one-click - MAMP for OSX, XAMP for OSX/Windows
  • existing web server - eg, ~/Sites directory on OSX.
  • virtual machine - If Vagrant is installed you can add this remote/branch and vagrant up

In addition to vanilla Apache the following modules are required:

  • Rewrite (mod_rewrite.so)
  • Expire (mod_expires.so)
  • Header (mod_headers.so)

Honestly, this fails. I tried getting this set up with AMPPS, and it failed. The headers were confusing as ever, and the javascript just wasn't working. So I decided to do things my own way. I created a docs version using Express and NodeJS. You can easily start up that a server for that folder by pointing PHPStorm or WebStorm to the app.js file in the folder in a run configuration. Don't forget to install the dependencies too :)

The files in the express-docs folder are different from the ones used in the official docs. I'll hopefully upload this to the server once it's tested and working, but for now, it's good to understand that the extra CSS has been reduced from the official docs pages to give you a better idea of what you're getting.


Automated testing forms the backbone of the jQuery Mobile project's QA activities. As a contributor or patch submitter you will be expected to run the test suite for the code your patches affect. Our continuous integration server will address the remainder of the test suite.

There are two primary ways to run the test suite. Both of them require a server configured in the previously prescribed manner. The location of which will hereafter be referred to as $WEB_SERVER and should include the protocol. First, you can run the tests individually by directing your browser to the different test pages associated with the area in which you are working. For example, to run the tests for js/jquery.mobile.forms.slider.js visit $WEB_SERVER/tests/unit/slider/. To find out which test pages are available you can list them with:

grunt config:test:pages

NOTE See the build requirements for node/grunt install information.

Second you can run the tests using the PhantomJS headless Webkit browser which must be installed. Once phantomjs is in your PATH the following will execute the whole test suite:

JUNIT_OUTPUT=build/test-results/ ROOT_DOMAIN=$WEB_SERVER grunt test

You can confine the headless run to a single test page or set of test pages using the TEST_PATH environment variable. For example:

TEST_PATH=slider JUNIT_OUTPUT=build/test-results/ ROOT_DOMAIN=$WEB_SERVER grunt test

will only run the tests where the path contains the string slider, eg tests/unit/slider/. NOTE that the phantom tests currently require that the web server be running to access and run the tests properly because of the PHP dependency that many of them share. Additionally the test suite is run against many versions of jQuery using the JQUERY environment variable. For example if you wanted to run the test suite against two of the currently supported versions, 1.7.2 and 1.9.0, the command would take the following form:

JQUERY=1.7.2,1.9.0 JUNIT_OUTPUT=build/test-results/ ROOT_DOMAIN=$WEB_SERVER grunt test


Often times when working on a feature or bug fix branch it's useful to pull in the latest from the parent branch. If you're doing this before submitting a pull request it's best to use git's rebase to apply your commits onto the latest from the parent branch. For example, working on new-feature branch where upstream is the remote at git://github.com/jquery/jquery-mobile.git:

git checkout new-feature
git fetch upstream
git rebase upstream/master
## ... here you may have to resolve some conflicts ... ##

You can now push to your own fork and submit the pull request. Keep in mind that it's only a good idea to do this if you haven't already submitted a pull request unless you want to create a new one because your origin remote (your fork) will report a discrepancy. Again, please refer to the chapter in Pro Git on rebasing if you're new to it.