javascript 如何解决错误：“未定义为空或不是对象，即在 ext js 中”在 IE 中？
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How to solve error: "undefined is null or not object ie in ext js" in IE?
提问by Angelin Nadar
I think its the cause of trailing comma, or syntax error, variable used without declaration. My js fiel is 1000 lines od code. Since the error is not provding me the line no. Its becoming dfficult to debug. Please help me with debugging techniques for IE. The script works very well with Firefox, Safari.
我认为这是尾随逗号或语法错误的原因，未声明就使用了变量。我的 js 字段是 1000 行 od 代码。由于错误没有向我证明行号。它变得难以调试。请帮助我调试 IE 技术。该脚本适用于 Firefox、Safari。
采纳答案by wombleton
I'd jslintthe file. That will find the issue as well as any others you may have.
我会jslint文件。这将找到问题以及您可能遇到的任何其他问题。
You can run it as a command line utility via node.
回答by Johan Olsson
include this <script type="text/javascript" src="https://getfirebug.com/firebug-lite-debug.js"></script>and <html debug="true">will give you an firebug console
http://getfirebug.com/firebuglite#Debug
包括这个<script type="text/javascript" src="https://getfirebug.com/firebug-lite-debug.js"></script>，<html debug="true">会给你一个萤火虫控制台
http://getfirebug.com/firebuglite#Debug
回答by Chau
If you are developing through Microsoft Visual StudioI remember it will help you find trailing commas by highlighting the following }element with a green curly underline.
如果您是通过Microsoft Visual Studio进行开发，我记得它会通过}用绿色卷曲下划线突出显示以下元素来帮助您找到尾随逗号。
If you use the built-in developer toolsin IE8and later, you can step through your code in the browser and determine which line causes the error - starting from the top.
如果使用内置的开发者工具在IE8和更高版本，可以通过在浏览器代码步骤，并确定哪些行导致错误-从顶部开始。
If you are not using any debugging tools in IE, then I will advise you to - just like Johanand bjorndare suggesting.
如果您没有在IE 中使用任何调试工具，那么我会建议您 - 就像Johan和bjornd所建议的那样。
Happy hunting :)
狩猎快乐:)
回答by bjornd
回答by MMT
回答by Angelin Nadar
Guys, I finally did it ? I took the strength of all your techniques.
伙计们，我终于做到了吗？我利用了你所有技术的力量。
1) I put the code in a single try{ code } and catch(e) { alert('Final Err: '+ e.description); }
1) 我把代码放在一个 try{ code } 和 catch(e) { alert('Final Err: '+ e.description); }
and kept initial 200 lines uncommented and the rest commented and ran the file
并保留最初的 200 行未注释，其余的注释并运行文件
while(EOF) {
if(got an alert of error)
checked for trailing commas & putting missed semicolons till end.
else
adding some more lines later uncommented out of the commented and ran the file.
}
Finally, the page got succesfully loaded !!!
终于，页面加载成功了！！！
回答by BuzzWasHere
I had this issue using the Extjs RowExpander user extension. The issue only occurred in IE. I was able to fix it by adding a few lines of code at the top of the 'toggleRow' method:
我在使用 Extjs RowExpander 用户扩展时遇到了这个问题。该问题仅发生在 IE 中。我能够通过在“toggleRow”方法的顶部添加几行代码来修复它：
if (!this.view) {
this.bindView();
}
For some reason IE occasionally chokes on references to 'this.view' (likely a timing issue). Running 'bindview()' ensures that 'this.view' resolves appropriately.
出于某种原因，IE 偶尔会因引用“this.view”而窒息（可能是时间问题）。运行“bindview()”可确保“this.view”正确解析。
