Javascript使用Firebug观察基于表达式的断点？-JavascriptwatchexpressionbasedbreakpointswithFirebug?

4  

To programmatically break on Javascript code, you can use the following statement:

要以编程方式中断Javascript代码,可以使用以下语句:

debugger;

This works in Firebug, Chrome's console and IE.

这适用于Firebug,Chrome的控制台和IE。

So following your question, you could do something like:

因此,按照您的问题,您可以执行以下操作:

if (this.id === "myId")
    debugger;

The following article is pretty useful.

以下文章非常有用。

4  

If you are referring to "conditional breakpoints", that is to say a breakpoint that only pauses execution when a statement is true, you can do this by right-clicking on a line of script, and selecting "Edit Breakpoint Condition...", then adding the statement you want to trigger the breakpoint, e.g., this.id === "foo";

如果您指的是“条件断点”,也就是说只有在语句为真时才暂停执行的断点,您可以通过右键单击一行脚本并选择“编辑断点条件...”来执行此操作。 ,然后添加你想要触发断点的语句,例如this.id ===“foo”;

1  

I'm not 100% clear on how what you need is different from a conditional breakpoint. e.g. adding

我不是100%清楚你需要什么与条件断点不同。例如加入

 var watchVar = this.id

then setting a condition for the breakpoint of

然后设置断点的条件

watchVar == someInt 

should work, no?

应该工作,不是吗?

If not, you can break on property change by placing a normal breakpoint somewhere in the closure. When you hit it, look for this.id in the watch pane, right click it and choose 'break on property change'. At the moment, that's about as far as you can go, but it doesn't allow you to specify some id values and not others.

如果没有,您可以通过在闭包中的某处放置一个普通断点来打破属性更改。当你点击它时,在监视窗格中查找this.id,右键单击它并选择“中断属性更改”。目前,这是你可以去的,但它不允许你指定一些id值而不是其他值。