src/ng/window.js


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'use strict';

/**
 * @ngdoc object
 * @name ng.$window
 *
 * @description
 * A reference to the browser's `window` object. While `window`
 * is globally available in JavaScript, it causes testability problems, because
 * it is a global variable. In angular we always refer to it through the
 * `$window` service, so it may be overriden, removed or mocked for testing.
 *
 * All expressions are evaluated with respect to current scope so they don't
 * suffer from window globality.
 *
 * @example
   <doc:example>
     <doc:source>
       <input ng-init="$window = $service('$window'); greeting='Hello World!'" type="text" ng-model="greeting" />
       <button ng-click="$window.alert(greeting)">ALERT</button>
     </doc:source>
     <doc:scenario>
     </doc:scenario>
   </doc:example>
 */
function $WindowProvider(){
  this.$get = valueFn(window);
}