Loaders.css

Delightful and performance-focused pure css loading animations.

What is this?

See the demo

A collection of loading animations written entirely in css. Each animation is limited to a small subset of css properties in order to avoid expensive painting and layout calculations.

I've posted links below to some fantastic articles that go into this in a lot more detail.

Install

bower install loaders.css

npm i --save-dev loaders.css

Usage

window.Loader

• Include loaders.s.min.css, loaders.s.min.js

 /**
  * ## settings
  */

 // 随机动画
 var loader1 = Loader('freestyle'); // or Loader()
 // 指定动画
 var loader2 = Loader('pacman'); // 动画名 Loader.animations
 // 参数设置
 var started = true; // 是否立即开始
 var loader3 = Loader('freestyle', {
  time: 5000, // >0 毫秒
  position: 'fixed', // 定位方式 可选 'absolute'
  body: 'body' // 挂载位置
 }, started)

 /**
  * methods
  */
 
 // 移除所有动画
 Loader.clear();  // static

 // 创建实例
 var loader = Loader();
 loader.start();  // 开始动画
 loader.stop(); // 停止动画
 loader.close(); // 关闭
 loader.timeout(millisec); // 延时关闭
 

Standard

• Include loaders.min.css
• Create an element and add the animation class (e.g. <div class="loader-inner ball-pulse"></div>)
• Insert the appropriate number of <div>s into that element

jQuery (optional)

• Include loaders.min.css, jQuery, and loaders.css.js
• Create an element and add the animation class (e.g. <div class="loader-inner ball-pulse"></div>)
• loaders.js is a simple helper to inject the correct number of div elements for each animation
• To initialise loaders that are added after page load select the div and call loaders on them (e.g. $('.loader-inner').loaders())
• Enjoy

Customising

Changing the background color

Add styles to the correct child div elements

.ball-grid-pulse > div {
  background-color: orange;
}

Browser support

Check the can I use tables. All recent versions of the major browsers are supported and it has support back to IE9.

Note: The loaders aren't run through autoprefixer, see this issue.

IE 11	Firefox 36	Chrome 41	Safari 8
✔	✔	✔	✔

Contributing

Pull requests are welcome! Create another file in src/animations and load it in src/loader.scss.

In a separate tab run gulp --require coffee-script/register. Open demo/demo.html in a browser to see your animation running.

Further research

• http://www.paulirish.com/2012/why-moving-elements-with-translate-is-better-than-posabs-topleft/
• http://aerotwist.com/blog/pixels-are-expensive/
• http://www.html5rocks.com/en/tutorials/speed/high-performance-animations/
• http://frontendbabel.info/articles/webpage-rendering-101/

Inspired by loaders.css

A few other folks have taken loaders and ported them elsewhere.

• React - Jon Jaques built a React demo you can check out here
• Angular - the-corman created some directives for angular, as did Masadow in this pr
• iOS - ninjaprox and ontovnik
• Android - Jack Wang created a library and technofreaky created an app

Licence

The MIT License (MIT)

Copyright (c) 2016 Connor Atherton

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.