Css:Conditional comments(条件注释)

geovindu

发布于 2026-06-18 20:08:03

840

http://msdn.microsoft.com/en-us/library/ms537512(VS.85).aspx

http://www.quirksmode.org/css/condcom.html

Item Example Comment ! [if !IE] The NOT operator. This is placed immediately in front of the feature, operator, or subexpression to reverse the Boolean meaning of the expression. lt [if lt IE 5.5] The less-than operator. Returns true if the first argument is less than the second argument. lte [if lte IE 6] The less-than or equal operator. Returns true if the first argument is less than or equal to the second argument. gt [if gt IE 5] The greater-than operator. Returns true if the first argument is greater than the second argument. gte [if gte IE 7] The greater-than or equal operator. Returns true if the first argument is greater than or equal to the second argument. ( ) [if !(IE 7)] Subexpression operators. Used in conjunction with Boolean operators to create more complex expressions. & [if (gt IE 5)&(lt IE 7)] The AND operator. Returns true if all subexpressions evaluate to true | [if (IE 6)|(IE 7)] The OR operator. Returns true if any of the subexpressions evaluates to true

<!--[if IE]><p>You are using Internet Explorer.</p><![endif]-->
<![if !IE]><p>You are not using Internet Explorer.</p><![endif]>

<!--[if IE 7]><p>Welcome to Internet Explorer 7!</p><![endif]-->
<!--[if !(IE 7)]><p>You are not using version 7.</p><![endif]-->

<!--[if gte IE 7]><p>You are using IE 7 or greater.</p><![endif]-->
<!--[if (IE 5)]><p>You are using IE 5 (any version).</p><![endif]-->
<!--[if (gte IE 5.5)&(lt IE 7)]><p>You are using IE 5.5 or IE 6.</p><![endif]-->
<!--[if lt IE 5.5]><p>Please upgrade your version of Internet Explorer.</p><![endif]-->

<!--[if true]>You are using an <em>uplevel</em> browser.<![endif]-->
<![if false]>You are using a <em>downlevel</em> browser.<![endif]>

<!--[if true]><![if IE 7]><p>This nested comment is displayed in IE 7.</p><![endif]><![endif]-->

<!--[if gte IE 7]>
<SCRIPT LANGUAGE="javascript">
alert("Congratulations! You are running Internet Explorer 7 or a later version of Internet Explorer.");
</SCRIPT>
<P>Thank you for closing the message box.</P>
<![endif]-->

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原始发表：2026-06-17，如有侵权请联系 cloudcommunity@tencent.com 删除

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