http get and post are not working

[XerO00]

html file
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<title>Angular Demo</title> <script src="lib/angular.js"></script> <script src="JSPS/serviceToGet.js"></script>

      <button ng-click="main.model.getStates()">GetHTTP</button>
       <ul>
        <li ng-repeat="state in main.model.states track by $index">{{state.name}}:{{state.abr}}</li>
       </ul>