ylws / ie8.js

Polyfill for JavaScript in Internet Explorer 8 and lower

ie8.js

Polyfill for JavaScript methods absent in Internet Explorer 8. Around 2KB gzipped.

License

The polyfill source code comes from Mozilla Developer Network, which are in public domain, therefore this compilation is also released into public domain under CC0 Public Domain Dedication.

Usage

Put this in your HTML.

<!--[if lt IE 9]>
  <script src="ie8.min.js"></script>
<![endif]-->

What’s Inside

Below is a list of things included in this polyfill.

       Name              |      Absent in      

-----------------------------|:----------------------: Object.create | Internet Explorer 7, 8 Object.defineProperties | Internet Explorer 7, 8 Object.keys | Internet Explorer 7, 8 Date.prototype.toISOString | Internet Explorer 7, 8 Date.now | Internet Explorer 7, 8 Array.isArray | Internet Explorer 7, 8 JSON | Internet Explorer 7 Function.prototype.bind | Internet Explorer 7, 8 String.prototype.trim | Internet Explorer 7, 8 Array.prototype.indexOf | Internet Explorer 7, 8 Array.prototype.lastIndexOf | Internet Explorer 7, 8 Array.prototype.every | Internet Explorer 7, 8 Array.prototype.some | Internet Explorer 7, 8 Array.prototype.forEach | Internet Explorer 7, 8 Array.prototype.map | Internet Explorer 7, 8 Array.prototype.filter | Internet Explorer 7, 8 Array.prototype.reduce | Internet Explorer 7, 8 Array.prototype.reduceRight | Internet Explorer 7, 8

Unpolyfillable

And below is a list of things that I failed to find a way to implement a polyfill. If you can fix any of this, please send a pull request.

       Name                 |      Absent in     

--------------------------------|:-----------------------: Object.defineProperty | Internet Explorer 7 Object.seal | Internet Explorer 7, 8 Object.freeze | Internet Explorer 7, 8 Object.preventExtensions | Internet Explorer 7, 8 Object.isSealed | Internet Explorer 7, 8 Object.isFrozen | Internet Explorer 7, 8 Object.isExtensible | Internet Explorer 7, 8 Object.getOwnPropertyDescriptor | Internet Explorer 7 Object.getOwnPropertyNames | Internet Explorer 7, 8