Ext.isIE 在 IE 11 中返回 false [英] Ext.isIE return false in IE 11

问题描述

当我尝试在 IE11 中使用 Ext.isIE 时，返回值是 false.然后在调试我的代码期间，我看到我收到以下错误:JavaScript 错误 - 消息:无效参数.，我的 extjs 版本是:4,2

When I try to use Ext.isIE in IE11 i get false the returning value. And then during the debug my code I see that I get the following error: JavaScript Error - Msg:Invalid argument., my extjs's version is: 4,2

推荐答案

在 ExtJS 4.2.2 之前，IE 11 不受官方支持(请参阅属性 isIE11).Microsoft 从 IE11 的用户代理中删除了 MSIE 部分(请参阅 here)，这就是它不适用于 ExtJS 4.2.1 及以下的原因.

IE 11 is not officially supported prior to ExtJS 4.2.2 (see property isIE11). Microsoft removed the MSIE part from IE11's user agent (refer here), which is the reason why it does not work with ExtJS 4.2.1 and below.

来自源代码，对于ExtJS 4.2.1:

isIE = !isOpera && check(/msie/),
isIE7 = isIE && ((check(/msie 7/) && docMode != 8 && docMode != 9 && docMode != 10) || docMode == 7),
isIE8 = isIE && ((check(/msie 8/) && docMode != 7 && docMode != 9 && docMode != 10) || docMode == 8),
isIE9 = isIE && ((check(/msie 9/) && docMode != 7 && docMode != 8 && docMode != 10) || docMode == 9),
isIE10 = isIE && ((check(/msie 10/) && docMode != 7 && docMode != 8 && docMode != 9) || docMode == 10),
isIE6 = isIE && check(/msie 6/),

对于 ExtJS 4.2.2:

isIE = !isOpera && (check(/msie/) || check(/trident/)),
isIE7 = isIE && ((check(/msie 7/) && docMode != 8 && docMode != 9 && docMode != 10) || docMode == 7),
isIE8 = isIE && ((check(/msie 8/) && docMode != 7 && docMode != 9 && docMode != 10) || docMode == 8),
isIE9 = isIE && ((check(/msie 9/) && docMode != 7 && docMode != 8 && docMode != 10) || docMode == 9),
isIE10 = isIE && ((check(/msie 10/) && docMode != 7 && docMode != 8 && docMode != 9) || docMode == 10),
isIE11 = isIE && ((check(/trident/7.0/) && docMode != 7 && docMode != 8 && docMode != 9 && docMode != 10) || docMode == 11),
isIE6 = isIE && check(/msie 6/),

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