52 lines
2.1 KiB
JavaScript
52 lines
2.1 KiB
JavaScript
|
// NOTICE!! DO NOT USE ANY OF THIS JAVASCRIPT
|
||
|
|
// IT'S JUST JUNK FOR OUR DOCS!
|
||
|
|
// ++++++++++++++++++++++++++++++++++++++++++
|
||
|
|
/*!
|
||
|
|
* Copyright 2014 Twitter, Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the Creative Commons Attribution 3.0 Unported License. For
|
||
|
|
* details, see http://creativecommons.org/licenses/by/3.0/.
|
||
|
|
*/
|
||
|
|
// Intended to prevent false-positive bug reports about Bootstrap not working properly in old versions of IE due to folks testing using IE's unreliable emulation modes.
|
||
|
|
(function () {
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
function emulatedIEMajorVersion() {
|
||
|
|
var groups = /MSIE ([0-9.]+)/.exec(window.navigator.userAgent)
|
||
|
|
if (groups === null) {
|
||
|
|
return null
|
||
|
|
}
|
||
|
|
var ieVersionNum = parseInt(groups[1], 10)
|
||
|
|
var ieMajorVersion = Math.floor(ieVersionNum)
|
||
|
|
return ieMajorVersion
|
||
|
|
}
|
||
|
|
|
||
|
|
function actualNonEmulatedIEMajorVersion() {
|
||
|
|
// Detects the actual version of IE in use, even if it's in an older-IE emulation mode.
|
||
|
|
// IE JavaScript conditional compilation docs: http://msdn.microsoft.com/en-us/library/ie/121hztk3(v=vs.94).aspx
|
||
|
|
// @cc_on docs: http://msdn.microsoft.com/en-us/library/ie/8ka90k2e(v=vs.94).aspx
|
||
|
|
var jscriptVersion = new Function('/*@cc_on return @_jscript_version; @*/')() // jshint ignore:line
|
||
|
|
if (jscriptVersion === undefined) {
|
||
|
|
return 11 // IE11+ not in emulation mode
|
||
|
|
}
|
||
|
|
if (jscriptVersion < 9) {
|
||
|
|
return 8 // IE8 (or lower; haven't tested on IE<8)
|
||
|
|
}
|
||
|
|
return jscriptVersion // IE9 or IE10 in any mode, or IE11 in non-IE11 mode
|
||
|
|
}
|
||
|
|
|
||
|
|
var ua = window.navigator.userAgent
|
||
|
|
if (ua.indexOf('Opera') > -1 || ua.indexOf('Presto') > -1) {
|
||
|
|
return // Opera, which might pretend to be IE
|
||
|
|
}
|
||
|
|
var emulated = emulatedIEMajorVersion()
|
||
|
|
if (emulated === null) {
|
||
|
|
return // Not IE
|
||
|
|
}
|
||
|
|
var nonEmulated = actualNonEmulatedIEMajorVersion()
|
||
|
|
|
||
|
|
if (emulated !== nonEmulated) {
|
||
|
|
window.alert('WARNING: You appear to be using IE' + nonEmulated + ' in IE' + emulated + ' emulation mode.\nIE emulation modes can behave significantly differently from ACTUAL older versions of IE.\nPLEASE DON\'T FILE BOOTSTRAP BUGS based on testing in IE emulation modes!')
|
||
|
|
}
|
||
|
|
})();
|