1 <!DOCTYPE html>
2 <html lang="zh-CN" ng-app="app">
3 <head>
4 <meta charset="utf-8">
5 <title>手动解析表达式（$parse）</title>
6 <link rel="stylesheet" href="../bootstrap.min.js">
7 </head>
8 <body ng-controller="myController">
9 <div ng-controller="myController">
10 <input type="text" ng-model="expr" placeholder="enter an expression">
11 <h2>{{ parsedValue }}</h2>
12 </div>
13 <script src="../angular.min.js"></script>
14 <script>
15 angular.module('app', [])
16 .controller('myController', function($scope, $parse) {
17 $scope.$watch('expr', function(newVal, oldVal, s) {
18 if(newVal !== oldVal) {
19 var parseFun = $parse(newVal);
20 $scope.parsedValue = parseFun(s);
21 // 你也可以这样写
22 // $scope.parsedValue = $parse(newVal)(s);
23 }
24 })
25
26 })
27 </script>
28 </body>
29 </html>
