如何在JavaScript中记录异常 [英] How to log exceptions in JavaScript

问题描述

作为C＃开发人员，我习惯了以下风格的异常处理：

  try 
 {
 throw SomeException（hahahaha！）; 
} 
 catch（Exception ex）
 {
 Log（ex.ToString（））; 
} 
 
输出
 ------ 
 
 SomeNamespace.SomeException：hahahaha！ 
在ConsoleApplication1.Main（）在ConsoleApplication1\Program.cs：行27 
  

它的真的很简单，但告诉我需要知道什么是异常以及它在哪里。我的

如何在JavaScript中实现异常对象的等效事物本身可能只是一个字符串。我真的想能够知道异常发生的确切代码行，但是以下代码根本不记录任何有用的代码：

  try 
 {
 var WshShell = new ActiveXObject（WScript.Shell）; 
 return WshShell.RegRead（HKEY_LOCAL_MACHINE\\\Some\\\Invalid\\Location）; 
} 
 catch（ex）
 {
 Log（捕获异常：+ ex）; 
} 
 
输出
 ------ 
 
捕获异常：[对象错误] 
  

编辑（再次）：只是为了澄清，这是内部应用程序，大量使用JavaScript。我在从生产系统中可能遇到的JavaScript错误中提取有用的信息之后，我已经有了一个记录机制，只是想要一种获得一个合理的字符串来记录的方式。

解决方案

几乎可以以相同的方式使用，例如。

 尝试
 {
 throw new Error（hahahaha！）; 
} 
 catch（e）
 {
 alert（e.message）
} 
  

但是，如果要获取行号和文件名，其中抛出错误，我想没有crossbrowser解决方案。消息和名称是Error对象的唯一标准属性。在mozilla你也有lineNumber和fileName属性。

As a C# developer I'm used to the following style of exception handling:

try
{
    throw SomeException("hahahaha!");
}
catch (Exception ex)
{
    Log(ex.ToString());
}

Output
------

SomeNamespace.SomeException: hahahaha!
    at ConsoleApplication1.Main() in ConsoleApplication1\Program.cs:line 27

Its really simple, and yet tells me everything I need to know about what the exception was and where it was.

How do I achieve the equivalent thing in JavaScript where the exception object itself might just be a string. I really want to be able to know the exact line of code where the exception happened, however the following code doesn't log anything useful at all:

try
{
    var WshShell = new ActiveXObject("WScript.Shell");
    return WshShell.RegRead("HKEY_LOCAL_MACHINE\\Some\\Invalid\\Location");
}
catch (ex)
{
    Log("Caught exception: " + ex);
}

Output
------

Caught exception: [object Error]

EDIT (again): Just to clarify, this is for internal application that makes heavy use of JavaScript. I'm after a way of extracting useful information from JavaScript errors that may be caught in the production system - I already have a logging mechanism, just want a way of getting a sensible string to log.

解决方案

You can use almost in the same manner ie.

try
{
    throw new Error("hahahaha!");
}
catch (e)
{
    alert(e.message)
}

But if you want to get line number and filename where error is thrown i suppose there is no crossbrowser solution. Message and name are the only standart properties of Error object. In mozilla you have also lineNumber and fileName properties.

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