打破变量值的变化 [英] Break on a change of variable value

问题描述

与此处的其他问题类似，喜欢这个。

有没有办法打破任何JavaScript调试器中变量值的变化？ （比如IE Developer工具，Visual Studio或Firebug）？

我想它就像是一个监视变量，但我希望能够看到callstack和当实际发生对变量的更改时暂停它。

另一种方法可能是使用自定义setter覆盖值设置，并在其中放置断点，但不幸的是这对IE AFAIK不起作用。

UPDATE
看来这种行为至少对于非托管代码是可用的写入C ++ 所以我想也许用C ++编写的javascript引擎（谷歌的V8）可能有类似的东西，但似乎没有我想要的东西。

Object.Watch教程

如果您使用任何一个调试器，我强烈推荐Firebug。对于您的所有Javascript，HTML和CSS需求： - ）：

http ：//getfirebug.com/javascript

Similar to other questions here, like this one.

Is there a way to break on the change of a variable value in any JavaScript debugger? (like IE Developer tools, Visual Studio, or Firebug)?

I guess it's something like a "watch variable", but I want to be able to see the callstack and pause it when the change to the variable actually occurs.

An alternative approach might be to override the value setting with a custom setter, and put a breakpoint in that, but unfortunately that won't work for IE AFAIK.

UPDATE It appears that this type of behavior is available at least for unmanaged code written in C++ So I thought maybe a javascript engine written in C++ (Google's V8) might have something similar, but that doesn't appear to have what I want either.

解决方案

You don't even need an IDE - you can use "Object.watch()":

Object.Watch Tutorial

If you use any one debugger, I'd strongly recommend Firebug. For all your Javascript, HTML and CSS needs :-):

http://getfirebug.com/javascript

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