Ext.isIE return false in IE 11

extjs extjs4.2
Vahe Akhsakhalyan picture Vahe Akhsakhalyan · Feb 19, 2014 · Viewed 9.3k times · Source

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

Answer

matt picture matt · Feb 19, 2014

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.

From the source code, for 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/),

and for 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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