Use of $parse in angular js [closed]

Question

Any ideas on where to use $parse of AngularJS.

Please give any examples or links which describes clearly.

Answer 1

Angular runs $parse automatically when it runs the $digest loop, basically $parse is the way angular evaluates expressions. If you wanted to manually parse an expression, you can inject the $parse service into a controller and call the service to do the parsing for you.

Here's a code snipped from ng-book that watches then parses an expression.

<div ng-controller="MyCtrl">   <input ng-model="expr" type="text" placeholder="Enter an expression" />     <h2>{{ parsedValue }}</h2> </div> 

then in our module,

angular.module("myApp", [])  .controller('MyCtrl',['$scope', '$parse', function($scope, $parse) {     $scope.$watch('expr', function(newVal, oldVal, scope) {       if (newVal !== oldVal) {         // Let's set up our parseFun with the expression         var parseFun = $parse(newVal);         // Get the value of the parsed expression          $scope.parsedValue = parseFun(scope);       }     });  }]); 

Answer 2

you likely won't use $parse directly, but it is what converts angular expressions into JavaScript functions. Expressions are JavaScript-like code snippets that are usually placed in bindings such as {{ expression }}.