条件注释不起作用

Question

I am extreamly new to HTML,

my goal is to set a global js variable to true when my website is running on IE.

I started by writing

<script> var runningIE = false;</script>
<!--[if IE ]>
    Special instructions for IE here
    <script> runningIE = true;</script>
<![endif]-->

no matter where I put this code (header, body) I don't see Special instructions for IE here printed anywhere not runningIE would be set to true on IE.

What am I missing here?

Answer 1

您可能正在IE 10中进行测试，它不支持条件注释（首先浏览器嗅探并不是一个好主意，并且自从将大量IE特定修复程序投入其中以来，IE已有了很大改进。 condcom）。