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<html><script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script><body ng-app=""><form> Select a topic: <select ng-model="myVar"> <option value=""> <option value="dogs">Dogs <option value="tuts">Tutorials <option value="cars">Cars </select></form><div ng-switch="myVar"> <div ng-switch-when="dogs"> <h1>Dogs</h1> <p>Welcome to a world of dogs.</p> </div> <div ng-switch-when="tuts"> <h1>Tutorials</h1> <p>Learn from examples.</p> </div> <div ng-switch-when="cars"> <h1>Cars</h1> <p>Read about cars.</p> </div></div><p>The ng-switch directive hides and shows HTML sections depending on the value of the dropdown list.</p></body></html>