jquery - AngularJS: Sum of Input values -

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i have simple list of inputs bound list of items display nicely. when change value in input, the sum doesn't update??

example: http://plnkr.co/edit/b7teasxsfvylrmj5xcnj?p=preview

html

<body ng-controller="mainctrl">  <div ng-repeat="item in items">    <p><input type=text value="{{item}}"></p>  </div>  total: <input type=text value="{{sum(items)}}"> </body>

script

app.controller('mainctrl', function($scope) {   $scope.items = [1,2,5,7];   $scope.sum = function(list) {   var total=0;   angular.foreach(list , function(item){     total+= item;   });   return total;  }  });

check fiddle implementation: http://jsfiddle.net/9tsdv/

the points take note of:

  • use ng-model directive input element allow two-way binding between item model , input element
  • since ng-repeat creates child scope , elements in items array of primitive type or value type , hence copied value during first digest cycle , further changes made input fields not reflected in sum because modifications bound present variables in ng-repeat's created child scope. (see other references on scope inheritance more details)

html:

<body ng-controller="mainctrl">  <div ng-repeat="item in items">    <p><input type=text ng-model="item.value"></p>  </div>  total: <input type=text value="{{sum(items)}}"> </body>

controller code:

app.controller('mainctrl', function($scope) {   $scope.items = [ { value: 1 }, { value: 2 }, { value: 5}, { value: 7 } ];   $scope.sum = function(list) {   var total=0;   angular.foreach(list , function(item){     total+= parseint(item.value);   });   return total;  }  });

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