Intro

• This is a JavaScript library to make MSIE behave like a standards-compliant browser.
• It fixes many CSS issues and makes transparent PNG work correctly under IE5 and IE6.
• Check out this demo page for more details.

Getting started

• Get the library via npm: npm install -S ie7js
• There are 3 scripts: IE7.js, IE8.js and IE9.js. They are backward compatible, which means the functionality that IE7.js and IE8.js has are included in IE9.js .
• Basically what you need to do is:

  <!--[if lt IE 9]>
  <script type="text/javascript" src="IE9.min.js"></script>
  <![endif]-->

• IMPORTANT: These CSS hacks take NO effect on inline styles, but support both internal and external stylesheets.

Dependencies

• There are no other dependencies except for one file blank.gif.
• Check to see if your build workflow has required it correctly, or manually copy it with IE9.min.js to your asset folder under the same level directory.

PNG

• The script only fixes images named: *-trans.png
• If you want the fix to apply to all PNG images then set a global variable as follows:

  var IE7_PNG_SUFFIX = ".png";

• You must set this variable before including the IE7.js script. Alternatively, you can set the variable inside the IE7.js script element:

  <script src="IE9.min.js">IE7_PNG_SUFFIX=".png";</script>

• The suffix will ignore query string parameters. For more fine-grained control you can also set IE7_PNG_SUFFIX to a RegExp object. If you want to use an alternative PNG solution then set the suffix to something that cannot possibly match:

  var IE7_PNG_SUFFIX = ":";

• By default, the PNG will be stretched (this simulates tiling). If you want to turn this off then set the no-repeat property as follows:

  div.example {
    background: url("my-trans.png") no-repeat;
  }

• Unfortunately, the transparent background image cannot be tiled (repeated) using background-repeat. Nor can it be positioned using background-position.

Credits and Links

• This library is credited by Dean Edwards, the copy in this repo is of its last and latest version 2.1(beta4).
• I put it here in GitHub for the convenience of management by NPM and integration in your own build workflow.
• Original repo hosted on Google: https://code.google.com/archive/p/ie7-js/
• Google groups: https://groups.google.com/forum/#!forum/ie7-js
• Related posts:
  • http://dean.edwards.name/weblog/2008/01/ie7-2/
  • http://dean.edwards.name/weblog/2010/03/ie7js-update/