Clojurians Log v2

The only difference I can imagine is remotely related is that the new project has an npm dependency that is an ES module (I think). Could that make shadow skip producing source maps?

no

it usually is a path issue. i.e. the files being generated correctly but setting a wrong :asset-path and thus the browser not finding them

you debug this by checking what your browser says

it'll usually give a you 404 errors or so

If there is a hyphen or underscore anywhere, try removing it. In fact, for extra safety, stick to letters between b and y.

Hyphen or underscore where?

stop distracting

the only possible issue is a path mismatch

or how does it manifest that "source maps don't work"?

I don’t see any 404. The source maps are produced, side by side with the js files, as normal.

is the error thrown deeply in some npm JS library? then it is not expected that source maps work. that has never worked. exceptions thrown in actual CLJS code should be fine?

The trace looks like so:

This is just me evaluating a throw.

hmm yeah that should be mapped

in the chrome console tab. on the top right corner for my is a "Default levels" drop down. Is "Info" activated?

IIRC chrome prints source map 404 at the info level

All levels are activated.

what is the path of the loaded JS?

http://localhost:8750/js/compiled/main.js and in the file system that is public/js/compiled/main.js

what happens if you load http://localhost:8750/js/compiled/main.js.map in the browser?

404! hmmm

ehm no wait this is a dev build

http://localhost:8750/js/compiled/cljs-runtime/cljs.core.js.map

That loads the source map

and what is the configured :asset-path in the build config, if any?

public/js/compiled

ok that is incorrect. should be /js/compiled as that is the path the files are loaded from over http

not the same as :output-dir

Ah, sweet, thanks! That was the only thing that differed from my “template” project. That project is a bit weird for reasons and has the web root in the project root. And I overdid the adaption… Now I have source maps working. 🙏

that means you must use :target :esm because otherwise node is unhappy

or given that the browser target works you can try setting :js-options {:js-provider :shadow :keep-native-imports true} in the :node-test config

Yay! Now my tests run again, using the js-options option.

Curious, can shadow still run tests if I use the esm target?

:target :esm usually is much more involved than just changing the build target, since it works a bit different and there currently is no explicit test support

yes, you can in theory still run tests, just not as convenient as :node-test