Support --inspect

[jonaskello]

It is possible to run node --inspect test1.js and get a link to debug in chrome. See here.

Would it be possible to add support for ts-node --inspect test1.ts and get similar support?

Seems babel-node has support for this.

[jonaskello]

That was fast, thanks! :-)

I did a quick test to verify like this:

test1.ts

console.log("hello");

setTimeout(() => 
    console.log("goodbye"), 
    20000);

ts-node --inspect test1.ts

I then open the provided debug URL in chrome within 20 seconds and can see the test1.ts file in the tree. I set a breakpoint on the goodbye line and it hits. So far it works great. However for me the sourcemaps don't get loaded correctly. When I open the test1.ts in DevTools I see the transpiled JS code and at the bottom I see //# sourceMappingURL=/var/folders/x9/80kc..... I checked for this file and it exists as well. Chrome is also displaying an information notice at the top of the file saying "Source maps detected". I'm no expert at sourcdemaps so I don't know what this all means but to me it looks as if all the pieces are in place but it is still not working. Maybe I should open a separate issue for this?

[blakeembrey]

I'm happy to keep the discussion here, just because I have no idea how to fix that. It seems like I'd be going into the Chrome debugger territory. Does babel's source maps work? Is there possibly some flag or config you need to change to use the source map? The source maps definitely work in node through source-map-support, so perhaps this is something else?

[blakeembrey]

Actually, see nodejs/node#8369 perhaps?

[jonaskello]

Yes, it looks to me as ts-node is providing all that should be needed so that nodejs issue is probably what is causing it. I will subscribe to that and see what they come up with. Thanks again for adding the option.

[quantuminformation]

I just tried debugging vitest test in chrome
` "test:debug": "npx ts-node --inspect node_modules/vitest/dist/index.js"

however I get Error: Unknown or unexpected option: --inspect

[reduxdj]

try this: npx ts-node index.js node --inspect-brk -r node_modules/vitest/dist/index.js

[cspotcode]

node options need to be passed to node, not to ts-node. There are a few options for this. One is using NODE_OPTIONS with the ts-node CLI. Another is node <node options here> --require ts-node/register or node <node options here> --loader ts-node/esm