Seems like an IDE issue. Breakpoints are not attac...

# javascript

[Edoardo Luppi]

Seems like an IDE issue. Breakpoints are not attached, but a debugger; statement works.

[turansky]

JFYI debugger

[broadway_lamb]

Or it can be incorrectly generated source maps. Could you open the generated source map in IDEA's source map visualizer and see which line in the generated JS code corresponds to the source line where you're trying to set the breakpoint?

[Edoardo Luppi]

> Or it can be incorrectly generated source maps
If that was the case, should I be able to step through the code?
Because if I place the debugger statement at the top, I can step through (and in) the code correctly.

[broadway_lamb]

Then probably source maps are not the issue, although I'm not 100% sure.

[Edoardo Luppi]

I need to find the time to downgrade the IDE to 2024.3

[Edoardo Luppi]

But it's strange. On the same IDE, a 1.9.24 project debugs correctly.

[Edoardo Luppi]

generated source map in IDEA's source map visualizer

Is this a plugin? I've never seen or used it

[broadway_lamb]

Oh, sorry, it's probably only available in the Ultimate edition as part of the JavaScript plugin.

You can send me the source map and the file and I can check it for you if it's okay.

[Edoardo Luppi]

I'm on Ultimate! Maybe I have no idea how to open it. Is it done just by opening the .map file?
I can see the raw representation only

[broadway_lamb]

There should be a tab called "Visualizer" on the left corner below the text editor.

[broadway_lamb]

Screenshot 2025-05-07 at 16.44.31.png

[Edoardo Luppi]

Found, thanks! Had no idea that existed lol.
Let me see if I can check what you asked me

[Edoardo Luppi]

Found the real culprit: it's the whole-program granularity that makes it impossible to debug.
When I switch back to per-module, breakpoints are correctly attached.

[Edoardo Luppi]

This is what I can see

[broadway_lamb]

So, seems like the relative paths inside the source map weren’t resolved correctly. Could you create an issue please?

[Edoardo Luppi]

Will do. Let me try to embed the Kotlin sources in the map file.

[broadway_lamb]

Or you can just replace relative paths with absolute ones

[turansky]

AFAIK It already exists

[turansky]

cc @Michael Porotkin

[turansky]

Issue

[Edoardo Luppi]

@broadway_lamb should this be sufficient to embed the .kt sources in the .map file?

binaries.withType<JsIrBinary>().configureEach {
  linkTask.configure {
    compilerOptions {
      sourceMap.set(true)
      sourceMapEmbedSources.set(JsSourceMapEmbedMode.SOURCE_MAP_SOURCE_CONTENT_ALWAYS)
    }
  }
}

[Edoardo Luppi]

Asking as I can't get the sourcesContent to be populated.

[broadway_lamb]

It should be sufficient, yes.

[Edoardo Luppi]

Then something is going wrong. I'll open an issue in YT about whole-program source maps.
And I'll also mention the fact sourcesContent is never populated.

[Edoardo Luppi]

There was an idea about deprecating per-module, please don't do that 😂

[Edoardo Luppi]

Created https://youtrack.jetbrains.com/issue/KT-77418

[broadway_lamb]

Thanks!