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JavaScript AngularJS An Introduction to Two-Way Data Binding Two-Way Binding: watchers

Posted by
1,329 Points

Getting a "parse error" for my code. What parameters needs to be included within the $watch function?

I've matched pretty closely to the $watch example in the video, and it does not execute.

app.js 
angular.module('myApp', [])
.controller('myController', function ($scope, $http) {
  $scope.user = {name: 'Alex', id: 123};

  getUserData = function (id) {
    console.log('Getting user with ID: ' + id);
  }

  $scope.$watch(user.id, function(newID){
    if (newID) {getUserData(newID)}
  }

  // YOUR CODE HERE

});
index.html 
<!DOCTYPE html>
<html ng-app="myApp">
<head>
  <title>Angular.js</title>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js"></script>
  <script src="app.js"></script>
</head>
<body ng-controller="myController">

  <input type="text" ng-model="user.id" />

</body>
</html>

2 Answers

Colin Bell
Colin Bell
29,679 Points
Colin Bell
Colin Bell
29,679 Points
  1. You want to pass in user.id as a string.
  2. You're forgetting a closing parentheses.
//                 v-- this needs to be a string
  $scope.$watch('user.id', function(newID){
    if (newID) {getUserData(newID)}
  }) // <-- Closing parentheses here
1,329 Points
1,329 Points

Thanks Colin, caught that and should have updated the question. Silly error but I appreciate the help.