javascript 分配 onreadystatechange 时类型不匹配错误是什么意思？
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What is a type mismatch error mean when assigning onreadystatechange?
提问by GC_
What is a JavaScript type mismatch error?
什么是 JavaScript 类型不匹配错误？
And what are the likely causes?
可能的原因是什么？
I can't include all the code, but here is the line that gets the error.
我不能包括所有的代码，但这里是出现错误的行。
xmlObject.onreadystatechange = null;
回答by bfavaretto
You are getting the error because xmlObject.onreadystatechangeexpects a function, but you are assigning nullto it. This should fix it:
您收到错误是因为xmlObject.onreadystatechange需要一个函数，但您正在分配null给它。这应该解决它：
xmlObject.onreadystatechange = function() {
// handle the readystatechange event here
}
