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Zepto.js – a minimalist JavaScript library

Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API. If you use jQuery, you already know how to use Zepto.

See zeptojs.com for an extended introduction, downloads and documentation.

Zepto.js is licensed under the terms of the MIT License.

Building

Build Status

The official site offers a download of the default distribution of Zepto. This is good for starting out. However, at some point you might want to add some optional modules and remove some of the default ones you don't need, to keep the size at minimum. That's when you need to check out Zepto's source code and use the build commands.

You will need Node.js installed on your system.

$ npm install
$ npm run-script dist

The resulting files are:

  1. dist/zepto.js
  2. dist/zepto.min.js

If you install CoffeeScript globally, you can run make directly:

$ coffee make dist
$ MODULES="zepto event data ..." ./make dist

Zepto modules

Zepto modules are individual files in the "src/" directory.

module default description
polyfill ✔ Provides String.prototype.trim and Array.prototype.reduce methods if they are missing (required for iOS 3.x)
zepto ✔ Core module; contains most methods
event ✔ Event handling via on() & off()
detect ✔ Provides $.os and $.browser information
fx ✔ The animate() method
fx_methods Animated show, hide, toggle, and fade*() methods.
ajax ✔ XMLHttpRequest and JSONP functionality
form ✔ Serialize & submit web forms
assets Experimental support for cleaning up iOS memory after removing image elements from the DOM.
data A full-blown data() method, capable of storing arbitrary objects in memory.
selector Experimental jQuery CSS extensions support for functionality such as $('div:first') and el.is(':visible').
touch Fires tap– and swipe–related events on touch devices
gesture Fires pinch gesture events on touch devices
stack Provides andSelf & end() chaining methods

Contributing

Get in touch:

  • IRC channel: #zepto on freenode.net
  • @zeptojs

Write documentation

Zepto docs are written in Markdown and live in the "gh-pages" branch. They are published on zeptojs.com.

You can use GitHub's web interface to make quick changes to documentation for specific Zepto features (example: ajaxSettings). This will submit a pull request to us that we can review.

Report a bug

  1. Check if the bug is already fixed in the master branch since the last release.
  2. Check existing issues. Open a new one, including exact browser & platform information. For better formatting of your report, see GitHub-flavored Markdown.

Running tests

You will need to install PhantomJS. On OS X, that's easy:

$ brew install phantomjs

To run the test suite, these are all equivalent:

$ npm test
$ ./make test
$ script/test