无法读取null的属性'documentElement' [英] Cannot read property 'documentElement' of null

问题描述

您好我正在使用此ajax.js从新闻网站中提取rss并注意到我收到此错误消息无法读取属性'documentElement'的null：ajax.js 149'可能是2-3次我认为当新闻网站将原始rss数据修改为某种方式（我猜测描述字段包括破折号等）时，它会给出该错误消息并且不显示内容..然后再次当他们更新了他们的xml时它再次工作......任何人都可以帮助我吗？



这是我在ajax.js中使用的代码的第149行



this.setXmlData = function（data）{

this.xmlData = data;

this.rootName = data.documentElement.nodeName;



this.setMakeControl（）;

Hello I am using this ajax.js to pull rss from news websites and noticed that I am getting this error message that says "Cannot read property 'documentElement' of null: ajax.js 149' maybe like 2-3 times a week. I think when the original rss data is modified to certain way (I am guessing when the description field includes dashes or etc.) by the news website, then it gives that error message and doesn't display the content .. then again it works again when they have updated their xml... Can anyone please help me?

Here is the line 149 of the code that I use in ajax.js

this.setXmlData = function(data){
this.xmlData = data;
this.rootName = data.documentElement.nodeName;

this.setMakeControl();

推荐答案

你没有验证什么。

也许数据实际上是空的。



如果（data！== null）作为支票就是你需要的。

不要把rss提供给那里。

You're not validating anything.
Perhaps the data is actually null.

If(data!==null) as a check is what you need.
Dont asume the rss feed to be there.

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