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vendor/bower-asset/bootstrap/docs/assets/js/ie-emulation-modes-warning.js 2.08 KB
b2a15e0c   Dmitryi   роли и права поль...
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  // NOTICE!! DO NOT USE ANY OF THIS JAVASCRIPT
  // IT'S JUST JUNK FOR OUR DOCS!
  // ++++++++++++++++++++++++++++++++++++++++++
  /*!
   * Copyright 2014-2015 Twitter, Inc.
   *
   * Licensed under the Creative Commons Attribution 3.0 Unported License. For
   * details, see https://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: https://msdn.microsoft.com/library/121hztk3%28v=vs.94%29.aspx
      // @cc_on docs: https://msdn.microsoft.com/library/8ka90k2e%28v=vs.94%29.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!')
    }
  })();