JavaScript 监听页面加载完成状态及 readyState 详解

JavaScript 监听页面加载完成状态及 readyState 详解

利用 document.onreadystatechange 方法可以监听页面状态的变化。

随后通过检查 document.readyState 是否等于 “complete” 来判断页面是否已完全加载。

 
document.onreadystatechange = subSomething;//当页面加载状态改变的时候执行这个方法.
function subSomething()
{ 
if(document.readyState == “complete”) //当页面加载状态
myform.submit(); //表单提交
} 

原文如下:

0: (Uninitialized) the send( ) method has not yet been invoked.

1: (Loading) the send( ) method has been invoked, request in progress.

2: (Loaded) the send( ) method has completed, entire response received.

3: (Interactive) the response is being parsed.

4: (Completed) the response has been parsed, is ready for harvesting.

0 － （未初始化）还没有调用send()方法

1 － （载入）已调用send()方法，正在发送请求

2 － （载入完成）send()方法执行完成，已经接收到全部响应内容

3 － （交互）正在解析响应内容

4 － （完成）响应内容解析完成，可以在客户端调用了