Targeting IE 8 and Below?

2019-04-08 14:10发布

站内问答 / JavaScript
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I have a script that runs great in IE 9+ and all other browsers. But in IE 8 or below there are visual errors. I can fix this visual errors by changing some animation effects for IE 8 and below. To do this I need to have two scripts on my page. One for IE 9+, Firefox, Chrome, Safari, and the other for IE 8 and below.

Here is what I have tried: 

// First the Script that runs for non-IE browsers. 
<!--[if !IE]>
<script type="text/javascript">
// Script that runs
</script>
<![endif]-->

// Now for the Script for IE 8
<!--[if lt IE 9]>
<script type="text/javascript">
// Script that runs
</script>
<![endif]-->

First Question and the main one is when attempting this it doesn't seem to work. IE starts acting crazy and the script doesn't function proerply at all. If I remove the first script and leave the second one it works without issue. It would seem that the <!--[if !IE]><!--> is not working correctly.

Second Question: Using <!--[if !IE]><!--> can I target only IE 8 and below?

1条回答
何必那么认真
2楼-- · 2019-04-08 15:02

Try doing it the HTML5 Boilerplate way. Then just target IE versions by class in JS and CSS.

Replace your opening <html> tag with the following. Adjust to your needs:

<!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7" lang="en"> <![endif]-->
<!--[if IE 7]>    <html class="no-js lt-ie9 lt-ie8" lang="en"> <![endif]-->
<!--[if IE 8]>    <html class="no-js lt-ie9" lang="en"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]-->

In JavaScript:

var isIE8 = document.getElementsByClassName('lt-ie9').length;
var isIE7 = document.getElementsByClassName('lt-ie8').length;

if (isIE8) {
  ...
}

if (isIE7) {
  ...
}
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