是的onload等于的readyState == 4 XMLHtt prequest? [英] Is onload equal to readyState==4 in XMLHttpRequest?
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问题描述
我很迷惑关于XHR返回时,我所知道的,没有的的onreadystatechange之间这么多不同? - >的readyState == 4 的和onload事件,这是真的。
VAR XHR =新XMLHtt prequest();
xhr.open(获取,网址,虚假);
xhr.onreadystatechange =功能(){
如果(xhr.readyState === 4)
{
/* 做一点事*/
}
};
xhr.send(空);
或
xhr.onload =功能(){/ *做某事* /}
解决方案
这应该是同样的事情。 的onload
中添加了XMLHtt prequest 2,而的onreadystatechange
由于原规范已经出现。
I am confuse about the xhr return event, as I can tell, there are not so much different between onreadystatechange --> readyState == 4 and onload, is it true?
var xhr = new XMLHttpRequest();
xhr.open("Get", url, false);
xhr.onreadystatechange = function() {
if (xhr.readyState === 4)
{
/* do some thing*/
}
};
xhr.send(null);
or
xhr.onload = function() { /* do something */ }
解决方案
It should be the same thing. onload
was added in XMLHttpRequest 2 whereas onreadystatechange
has been around since the original spec.
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