my kotlinjs `.js.map` files do not seems to work, as in .. when i open the debugger in chrome the fi...

# javascript

[Nikky]

my kotlinjs .js.map files do not seems to work, as in .. when i open the debugger in chrome the files are empty
i use moduleKind = "umd" and require.js to load all things (because everything else seemed to be unproportional more effort)
anybody else having this issue.. or have working source mappings ?

[Ilya Goncharov [JB]]

I suppose, that it can be related with https://youtrack.jetbrains.com/issue/KT-32319
It plans to be fixed in next eap
In this issue, there is workaround for this problem

[Nikky]

that fixed it, thanks

[Nikky]

it seems to also still work with dce in the mix

[Nikky]

do you how to minify the code more without loosing source mapping ?

[Ilya Goncharov [JB]]

Now source maps is inlined to final bundle
You can patch webpack configuration in webpack.config.d
Something like this

config.devtool='source-map'

It locates source maps in separate file

[Nikky]

i have zero experience using webpack, i kinda hoped to just call a script that translates js in one folder and spits it into another folder

[Ilya Goncharov [JB]]

Oh, sorry, I miss that you use only DCE w/o webpack
Manipulation with source maps is hard, because there is relative path in it

[Nikky]

i am currently experimenting with uglifyjs used via cli, i read somewhere it can read sourcemaps and generates them
so far not much luck

[Ilya Goncharov [JB]]

If source maps are generated by compiler and/or Kotlin/JS DCE, it can be related with UglifyJS issues. Sorry, can’t help with it, because have never tried this tool chain
AFAIK UglifyJS is not supported yet, you can try Terser instead

[Nikky]

bash script for terser cli:

#!/usr/bin/env bash

./gradlew runDceClient-jsKotlin
OUTPUT=build/html/js/
rm -rf $OUTPUT
mkdir $OUTPUT
FILES=build/kotlin-js-min/client-js/main/*.js
for f in $FILES
do
  if [[ "$f" == *.meta.js ]]; then continue; fi
  echo "Processing $f file..."
  terser $f --source-map "content='$f.map',url='$b.map'" -c -m -o $OUTPUT/$(basename $f)
done