Thursday, April 11, 2013

AngularJS controller

So I spent quite a lot of time figuring out how to set up an AngularJS controller without polluting the default namespace/scope. Here is the recipe with a simple click listener showing that it works:

index.html

<doctype html>
<html ng-app="main">
  <head></head>
  <body ng-controller="mainController">
    <button ng-click="log()">Log</button>
    <script type="text/javascript" src="angular.min.js"></script>
    <script type="text/javascript" src="main.js"></script>
  </body>
</html>

main.js

var main = angular.module('main', []);

main.controller('mainController', function($scope) {
  $scope.log = function() {
    console.log('Logging a simple message...');
  }
});

You can easily see which names map to which implementation, e.g. ng-app="main" is angular.module('main', []);, so on and so fourth.

Note: It is extremely important to invoke angular.module with the second argument (in this case, the empty array), otherwise, it is not going to work.

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