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POAngularJS watch json periodically
 

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    <p>I try to get a json file via $http by calling a DataService periodically.</p> <p>Then I want to use the $watch functionality to react to any data change. However the watch function never gets triggered more than once. Why?</p> <pre><code>var app = angular.module('myApp', ['ngRoute']). config(['$routeProvider', function ($routeProvider) { //... }]) . run(function ($rootScope, $timeout, $location, DataService) { $rootScope.jsonData = {} var delaytime = 10 * 1000; $rootScope.jsonData = DataService.getData(); $timeout(function repeat() { console.log("in repeat") $rootScope.jsonData = DataService.getData(); $timeout(function () { console.log("in inner repeat") repeat(); }, delaytime ); }, delaytime ); console.log("xxx") console.log($rootScope.jsonData) $rootScope.$watch('jsonData', reactToDataChange($rootScope, $location)); }) ; function reactToDataChange($rootScope, $location) { console.log("yyy") console.log($rootScope.jsonData) // ... } </code></pre> <p>DataService:</p> <pre><code>app.service('DataService', function ($http) { var data = null; function setData(newdata) { data = newdata; } return { getData: function () { console.log("getting data"); var rand = "?rand=" + Math.random() * 10000; $http.get('data/bla.json' + rand, {cache: false}) .success(function (newdata) { console.log(newdata); setData(newdata); }) . error(function (data, status, headers, config) { console.log("error"); console.log(status) }); return data; } }; }); </code></pre> <p>Console shows:</p> <pre><code>getting data xxx null yyy null new data:[object Object] Object {bla: Object} in repeat getting data new data:[object Object] Object {bla: Object} in inner repeat in repeat getting data new data:[object Object] Object {bla: Object} in inner repeat in repeat ... </code></pre> <p>Why is yyy not shown again?</p>
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    1. COI can't see definition of `getData()` in your DataService and I'm wondering how it works at all. Shouldn't it have `getData: function(){ /* contents of current return */ }` inside `return` in DataService?
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    2. COsorry somehow the inner function declaration was deleted by me when I edited the code for the question. Now updated version
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