modernizr/feature-detects/hashchange.js

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

/*!
{
  "name": "Hashchange event",
  "property": "hashchange",
  "caniuse": "hashchange",
  "tags": ["history"],
  "notes": [{
    "name": "MDN documentation",
    "href": "https://developer.mozilla.org/en-US/docs/Web/API/window.onhashchange"
  }],
  "polyfills": [
    "jquery-hashchange",
    "moo-historymanager",
    "jquery-ajaxy",
    "hasher",
    "shistory"
  ]
}
!*/
/* DOC
Detects support for the `hashchange` event, fired when the current location fragment changes.
*/
define(['Modernizr', 'hasEvent'], function(Modernizr, hasEvent) {
  Modernizr.addTest('hashchange', function() {
    if (hasEvent('hashchange', window) === false) {
      return false;
    }

    // documentMode logic from YUI to filter out IE8 Compat Mode
    //   which false positives.
    return (document.documentMode === undefined || document.documentMode > 7);
  });
});