It's created for IE6-IE8.

Modern browsers are so powerfull. For some small project, this is no any reason to include a large JavaScript library. For example, jQuery, Kissy and so on.

So, what we need is just a file of JavaScript witch is created only for IE6-IE8, and make IE6-IE8 like a modern browser(Chrome, IE9+, ...).

Simplely, include 'ieBetter.js', then just use APIs as in modern browser. For example, you can use document.querySelector to select the DOM element, and so on. The APIs that you can use see below.

document.querySelector("#id");

Because of that only IE6-IE8 need ieBetter.js. So we have to do some special deal. For Example, IE conditional comments. Like this:

<!--[if lte IE 8]>
<script src="ieBetter.js"></script>
<![endif]-->

However, IE10+ begin to ignore conditional comments. So, for this browser, if the page is in a IE6-IE8 documentMode, ieBetter.js will be ignore. So, maybe you can try this method:

if (!document.addEventListener) {
    // IE6~IE8
    document.write('<script src="ieBetter.js"><\/script>');	
}

Good luck for you!

So far, the APIs that has supported are:

• 选择器相关API
*.querySelector
*.querySelectorAll
*.getElementsByClassName

• 事件相关API
*.addEventListener
*.removeEventListener
*.dispatchEvent
document.createEvent
init[|Mouse|UI]Event
input
window.onhashchange

• DOM特性相关API
window.getComputedStyle

• ES5 JSON扩展
JSON.parse
JSON.stringify

• ES5 Object扩展
Object.create
Object.keys

• Date对象
Date.now

• ES5 Function扩展
Function.bind

• ES5 String扩展
String.trim

• ES5 数组方法扩展
Array.isArray
Array.forEach
Array.map
Array.filter
Array.some
Array.every
Array.indexOf
Array.lastIndexOf
Array.reduce
Array.reduceRight

You can visit API document to get more infomation: http://rawgithub.com/zhangxinxu/ieBetter.js/master/index.html

Still, you can visit here to some other information.

The MIT License