Function bindJQuery

lib/test/angular/1.7.0/angular.js:2001–2050

()

var bindJQueryFired = false;
function bindJQuery() {
  var originalCleanData;

  if (bindJQueryFired) {
    return;
  }

  // bind to jQuery if present;
  var jqName = jq();
  jQuery = isUndefined(jqName) ? window.jQuery :   // use jQuery (if present)
           !jqName             ? undefined     :   // use jqLite
                                 window[jqName];   // use jQuery specified by `ngJq`

  // Use jQuery if it exists with proper functionality, otherwise default to us.
  // AngularJS 1.2+ requires jQuery 1.7+ for on()/off() support.
  // AngularJS 1.3+ technically requires at least jQuery 2.1+ but it may work with older
  // versions. It will not work for sure with jQuery <1.7, though.
  if (jQuery && jQuery.fn.on) {
    jqLite = jQuery;
    extend(jQuery.fn, {
      scope: JQLitePrototype.scope,
      isolateScope: JQLitePrototype.isolateScope,
      controller: /** @type {?} */ (JQLitePrototype).controller,
      injector: JQLitePrototype.injector,
      inheritedData: JQLitePrototype.inheritedData
    });
  } else {
    jqLite = JQLite;
  }

  // All nodes removed from the DOM via various jqLite/jQuery APIs like .remove()
  // are passed through jqLite/jQuery.cleanData. Monkey-patch this method to fire
  // the $destroy event on all removed nodes.
  originalCleanData = jqLite.cleanData;
  jqLite.cleanData = function(elems) {
    var events;
    for (var i = 0, elem; (elem = elems[i]) != null; i++) {
      events = jqLite._data(elem).events;
      if (events && events.$destroy) {
        jqLite(elem).triggerHandler('$destroy');
      }
    }
    originalCleanData(elems);
  };

  angular.element = jqLite;

  // Prevent double-proxying.
  bindJQueryFired = true;
}

/**
 * throw error if the argument is falsy.