angular-$parse.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>angular-$parse</title>
        <script type="text/javascript" src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
    </head>
    <body ng-app="app" ng-controller="MyController">
        <input type="text" ng-model="expression" placeholder="enter a expression">
        <div>The result is {{result}}</div>
        <script type="text/javascript">
            var app = angular.module('app', []);
            app.controller('MyController', ['$scope', '$parse', '$timeout', function($scope, $parse, $timeout){
                $timeout(function(){
                    $scope.expression = '1+1';
                }, 1000);
                $scope.$watch('expression', function(newValue, oldValue, scope){
                    if(newValue != oldValue){
                        // 手动解析表达式
                        // var 解析后的函数 = $parse(表达式)
                        var parseFn = $parse(newValue);
                        // 执行解析后的函数
                        $scope.result = parseFn(scope, null);
                    }
                });
            }]);
        </script>
    </body>
</html>