javascript - 简单的 jQuery $.get 示例代码不起作用

Question

我正在尝试获取网页的输出，我发现 jQuery 有一种方法可以通过 $.get method 执行此操作.

从上面的链接中，我找到了以下示例代码:

$.get('ajax/test.html', function(data) {
  $('.result').html(data);
  alert('Load was performed.');
});

我将示例代码修改为以下内容:

$.get('http://www.google.com', function(data) {
  $('.result').html(data);
  alert('Load was performed.');
});

但它不起作用。在这里查看:http://jsfiddle.net/6WQqD/1/

我做错了什么？如何发出输出页面内容的简单 HTTP 请求？

Answer 1

Same origin policy :

In computing, the same origin policy is an important security concept for a number of browser-side programming languages, such as JavaScript. The policy permits scripts running on pages originating from the same site to access each other's methods and properties with no specific restrictions, but prevents access to most methods and properties across pages on different sites.