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source/_posts/条件注释判断浏览器.md

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+---
+title: 条件注释判断浏览器
+tags: []
+id: '38'
+categories:
+  - - 分享
+date: 2016-06-14 10:03:23
+---
+
+项目
+
+范例
+
+说明
+
+!
+
+\[if !IE\]
+
+_The NOT operator. This is placed immediately in front of the?feature,?operator, or?subexpression?to reverse the Boolean meaning of the expression._ **NOT运算符。这是摆立即在前面的_功能_，_操作员_，或_子表达式_扭转布尔表达式的意义。**
+
+lt
+
+\[if lt IE 5.5\]
+
+_The less-than operator. Returns true if the first argument is less than the second argument._ **小于运算符。如果第一个参数小于第二个参数，则返回true。**
+
+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._ **小于或等于运算。如果第一个参数是小于或等于第二个参数，则返回true。**
+
+gt
+
+\[if gt IE 5\]
+
+_The greater-than operator. Returns true if the first argument is greater than the second argument._ **大于运算符。如果第一个参数大于第二个参数，则返回true。**
+
+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._ **大于或等于运算。如果第一个参数是大于或等于第二个参数，则返回true。**
+
+( )
+
+\[if !(IE 7)\]
+
+_Subexpression operators. Used in conjunction with boolean operators to create more complex expressions._ **子表达式运营商。在与布尔运算符用于创建更复杂的表达式。**
+
+&
+
+\[if (gt IE 5)&(lt IE 7)\]
+
+_The AND operator. Returns true if all subexpressions evaluate to true_ **AND运算符。如果所有的子表达式计算结果为true，返回true**
+
+\[if (IE 6)(IE 7)\]
+
+_The OR operator. Returns true if any of the subexpressions evaluates to true._ **OR运算符。返回true，如果子表达式计算结果为true。**
+
+  举个栗子
+
+```
+
+<!-- [if IE 7]> 仅IE7可识别 <![endif]-->
+<!--[if lte IE 7]> IE7以及IE7以下版本可识别 <![endif]-->
+<!--[if gte IE 7]> IE7以及IE7以上版本可识别 <![endif]-->
+```