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POAngularJS controller inheritance
 

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  1. POAngularJS controller inheritance
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    <p>AngularJS has a DOM based controller inheritance, as mentioned in the angular Docs.</p> <pre><code>&lt;div ng-controller="BaseController"&gt; &lt;p&gt;Base Controller Value: {{value}}&lt;/p&gt; &lt;button ng-click="updateValue()"&gt;Update In Base&lt;/button&gt; &lt;div ng-controller="DerivedController"&gt; &lt;p&gt;Derived Controller Value: {{value}}&lt;/p&gt; &lt;button ng-click="updateValue()"&gt;Update In Derived&lt;/button&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p>The scope variable "value" is present only in the BaseController. Based on this, while changing the value at a method in BaseController or DerivedController, I want both the values need to be updated. But only the individual scope variable gets updated.</p> <p>Here is a fiddle demonstrating the same example: <a href="http://jsfiddle.net/6df6S/1/">http://jsfiddle.net/6df6S/1/</a></p> <p>How can changes at a level be made to propagate to the immediate child and immediate parent of the current scope.</p> <p>We can implement this by using </p> <blockquote> <p>$scope.$watch</p> </blockquote> <p>Is there any way to do this without using it or any such watchers?</p> <p>Edit 1:</p> <p>By using $scope.$watch here is what I meant</p> <pre><code>$scope.$watch("value", function () { $scope.$broadcast("childChangeListener"); //Downwards to all children scopes $scope.$emit("parentChangeListener"); //Upwards to all parent scopes }); </code></pre> <p>I was looking for ways in which the value would get updated across all scopes without using such a mechanism.</p>
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    1. USPraveenram Balachandar
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    1. COplease use $rootScope
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      1. USAjay Beniwal
    2. COIs there a way to share $scope without having to put the properties and methods in the $rootScope?
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      1. USPraveenram Balachandar
    3. COPlease do not use $rootScope. Use a service instead for sharing data between controllers (see my answer).
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      1. USMark Rajcok
 

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