No source map generated by TypeScript plugin when specified in tsconfig.json

[David-Else]

• Rollup Plugin Name: @rollup/plugin-typescript
• Rollup Plugin Version: 3.0.0
• Rollup Version: 1.31.1
• Operating System (or Browser): Linux
• Node Version: 12

How Do We Reproduce?

https://repl.it/repls/ElaborateStingyParallelport

Press run

Expected Behavior

A sourcemap file should be generated in the output folder as it was "sourceMap": true, in the tsconfig.json

Actual Behavior

It is not, so debugging in the browser does not work properly.

[shellscape]

@David-Else thanks for the issue. Please see the issue template for instructions on providing a proper reproduction. What you've provided here is not, unfortunately.

[David-Else]

@shellscape I spent a while on this, even making a script for you to make a complete environment to reproduce the issue.

Before I invest more time, please just quickly confirm that the plugin IS expected to create a sourcemap? Thanks.

[shellscape]

While appreciated, we do have instructions in the issue template to keep people on track with what we need to triage. I highly recommend paying close attention to other project's templates in the future.

The simple fact is that our time and resources are limited, and having to setup an environment, versus a REPL or repo link, eats into the time we have available to triage for folks who have followed the template.

[David-Else]

@shellscape I have created this to demonstrate the bug:

https://repl.it/repls/ElaborateStingyParallelport

When I run it the file bundle.js is created, but no sourcemap. Is this OK for you to remove the 'no reproduction' flag? I have edited the original post too.

[shellscape]

Apologies if you felt that label was derogatory. It's only for maintainers for at-a-glance statuses.

Thanks for putting that together. That's going to be a huge help.

[David-Else]

@shellscape Don't worry, I did not think the label was derogatory, I just wanted to help get the bug fixed asap :) Cheers, great plugin!

[NotWoods]

You also need to add sourcemap: true to the Rollup output options. I'll also work on adding a warning when the Typescript option is on but not the corresponding Rollup option.

[NotWoods]

Waning added in version 4.0.0 of the typescript plugin

[HarelM]

I have this warning in my project - maplibre-gl-js although I use this sourcemap: 'inline' or true in the output.
The project is here:
https://github.com/maplibre/maplibre-gl-js
The warning can be seen when running npm run build-dev or npm run build-prod.
Let me know if you prefer I open a new issue on this.

maplibre-gl-js % npm run build-dev

> maplibre-gl@3.2.0 build-dev
> rollup --configPlugin @rollup/plugin-typescript -c --environment BUILD:dev

loaded rollup.config.ts with warnings
(!) Plugin typescript: @rollup/plugin-typescript: Rollup 'sourcemap' option must be set to generate source maps.
(node:31559) ExperimentalWarning: Importing JSON modules is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)

src/index.ts, src/source/worker.ts → staging/maplibregl...
created staging/maplibregl in 4.2s

build/rollup/maplibregl.js → dist/maplibre-gl-dev.js...

[HarelM]

Any update on the above?
No matter what I try I still get this warning in the build...
I also tried the following but it didn't work...
https://stackoverflow.com/questions/63128597/how-to-get-rid-of-the-rollup-plugin-typescript-rollup-sourcemap-option-must

Any help would be appreciated!

[lukastaegert]

You are not getting this error from the build but from transpiling the config file:
loaded rollup.config.ts with warnings

Make sure to remove the sourceMap option from your tsconfig.json!

[HarelM]

Ah, great! Thanks for the tip!