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I am trying to debug legacy scripts with Firebug. As per my knowledge (Which I got yesterday) we use Step over (F10) to debug line by line and Step into (F11) to dig into JS function. But when I use Step into on any JS function call, it takes control to next line. I want to see what is hidden inside the function. How can we do it ?
I kept break-point inside the function and then tried Step into then it takes control inside the function body. But it is tedious to find each function method and set break-point. Is there any other way to do it ? or which is the right way ?
For example : 

 i2b2.ONT.ctrlr.FindBy = {

    clickSearchName: function() {
      // do some stuff
      i2b2.ONT.ctrlr.FindBy.doNameSearch(search_info);  // I tried Step into here
      // some more stuff
    }  

    doNameSearch: function(inSearchData) {
     // If I set break-point here then only I can debug it 
     // or it directly takes control to `// some more stuff` in `clickSearchName:function` 

    }
 }

PS: It also more external JS function calls.

Thanks,
Ajinkya.

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2 Answers 2

up vote 0 down vote accepted

"Step into" will step into the function if there is JS source for the function. If not (like for document.getElementById("foo"), it will step over it since it doesn't have anything that it understand to step into.

If you can point us to a working example where you are having the problem (either a jsFiddle reduction of the problem or a working web page) with instruction on where the relevant code is, we can probably help more.

Judging by your code example, I'm wondering what you're trying to step into. The line of code that starts with clickSearchName defines a function. It doesn't execute it. So, it won't go into that function until some later code actually calls clickSearchName. So, perhaps you're breaking on the definition of the function and trying to step into the function when it isn't being executed. That's just a guess though since we don't have a working example to try ourselves.

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@jfiend00: As I mentioned in the example doNameSearch have JS source. Is there anything else we need to consider ? – xyz Aug 30 '11 at 6:05
    
@Ajinkya - See the last paragraph I added to my answer. – jfriend00 Aug 30 '11 at 6:07
    
As per my observation (which may be wrong) doNameSearch is called from clickSearchName and I tried Step into on same function call. – xyz Aug 30 '11 at 6:10
1  
Was someone actually calling clickSearchName or were you just stepping over the definition of clickSearchName? Do you understand the difference between those two scenarios? A working example of code that illustrates this problem put in a tool like jsFiddle would remove all confusion about what you're really asking. Step Into will step in. So, there's something else wrong with the situation that you are describing to us and we need to see/understand more about your situation to know how to help you. – jfriend00 Aug 30 '11 at 6:15
    
Yes clickSearchName is called from my application. I cann't create a fiddle as there are so many other things involved. – xyz Aug 30 '11 at 6:18
up vote 0 down vote

Add the line debugger; to your code at the place where you want to break into the debugger, it's a JavaScript keyword, which should do what you want. Just remember to take it out when you're done debugging your code.

share|improve this answer
    
@rm: Thats the thing I want to avoid. There are tons of function call and I don't want to go to each function to set beakpoint or add debugger;. I thought Step into will do it.Isnt it ? – xyz Aug 30 '11 at 6:12

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