Hi all,
I am working on a project where I am setting a two breakpoints on two
different function calls. For example, consider the below snippet of code,
function f1(type){
// type could be event1, event2, event3, etc.,
// 1st breakpoint when f1 is called
f2();
}
function f2(){
setTimeout(f3, 200);
}
function f3(){
// 2nd breakpoint when f3 is called
}
In the above code, I have breakpoint set on f1 and f3, and f3 is part of
the same function call chain as of f1. They can also have async functions
between them, which as I understand are only executed after the current
call stack is cleared. For async traces, AFAIK the previous stack trace is
attached as a parent to related calls executed by microtask queue.
To track this, I would need an identifier which is unique to a call chain
and async boundaries (i.e setTimeout, XMLHTTPRequest, promises). Is there
any such identifier which I could use to identify that f3() is called by
f1() which has `type` set as "event1" (i can check the name of this
function using the stack trace, but there is no way I can figure out that
the type is event1 since all the scopes are already destroyed for async
traces).
The only possible solution I can come up with is, if I had access to a
unique identifier which is only unique throughout the function chain, in JS
side I can simply store the type in a map(`eventTracesMap`) with the
identifier as key on breakpoint 1(i.e when f1 is called). When the second
breakpoint(i.e f3) is hit, I can query the map and get the info i need
using that unique identifier again.
const eventTracesMap = {}
Please let me know if anyone has any solutions regarding this, thanks in
advance
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