angular.js - 很简单的一个angularjs入门级demo，但是报错了。

本人初学angularjs，在看一本书的《angularjs 权威教程》，第二章有个demo，如下。

这里使用angular版本1.2.29,如果换成1.3.1 会报错。

请问，这是如何造成的呢？应该怎么样调试这个错误呢？

<!doctype html> 
<html ng-app> 
<head> 
    <meta charset="utf-8"> 
    <title>Simple App</title> 
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.2.29/angular.min.js"></script>
</head>
<body>
    <p ng-controller="MyController">
        <h1>Hello {{clock}}</h1>
    </p>
    
    <script type="text/javascript">
        function MyController($scope, $timeout) {
            $scope.clock = new Date();
            var updateClock = function() {
              $scope.clock = new Date();
            };
            setInterval(function() {
              $scope.$apply(updateClock);
            }, 1000);
            updateClock();
      };
    </script>
</body>
</html>

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Antworte allen(2)Ich werde antworten

迷茫2017-05-15 16:58:52

1.3版本后不在window对象上寻找controllers了 $controller will no longer look for controllers on window.

https://github.com/angular/angular.js/blob/master/CHANGELOG.md#breaking-changes-31

<!DOCTYPE html>
<html ng-app="app">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
 <p ng-controller="MyController">
        <h1>Hello {{clock}}</h1>
    </p>
    
    <script type="text/javascript">
     (function(){
        angular.module("app", []).controller("MyController", MyController);
      
         
        MyController.$inject = ['$scope', '$timeout'];
       
        function MyController($scope, $timeout) {
            $scope.clock = new Date();
            var updateClock = function() {
              $scope.clock = new Date();
            };
            setInterval(function() {
              $scope.$apply(updateClock);
            }, 1000);
            updateClock();
       }
     })();
    </script>
</body>
</html>

The JS Bin
http://jsbin.com/vekixa/edit?html,console,output

如果无法翻墙，请换墙内的CDN

Antwort

曾经蜡笔没有小新2017-05-15 16:58:52

建议楼主跟进到 1.4 版本（版本真的很重要）

<!doctype html> 
<html ng-app> 
<head> 
    <meta charset="utf-8"> 
    <title>Simple App</title> 
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.7/angular.min.js"></script>
</head>
<body>
    <p ng-controller="MyController">
        <h1>Hello {{clock}}</h1>
    </p>
    
    <script type="text/javascript">
        function MyController($scope, $timeout) {
            $scope.clock = new Date();
            var updateClock = function() {
              $scope.clock = new Date();
            };
            setInterval(function() {
              updateClock();
            }, 1000);
      };
    </script>
</body>
</html>

像这样就可以了。。当然也可以写

<!doctype html> 
<html ng-app> 
<head> 
    <meta charset="utf-8"> 
    <title>Simple App</title> 
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.7/angular.min.js"></script>
</head>
<body>
    <p ng-controller="MyController">
        <h1>Hello {{updateClock()}}</h1>
    </p>
    
    <script type="text/javascript">
        function MyController($scope, $timeout) {
            $scope.updateClock = function() {
             return new Date();
            };
            setInterval(function() {
              updateClock();
            }, 1000);
      };
    </script>
</body>
</html>

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