But all those tiny times add up, over years, decades. And eclipse the time of that afternoon+ spent on learning & configging debuggers in months already.
Don't be me, that senior dev who'd been promising himself for decades to really get down to learning and setting up gdbg or equivalent. And then, once invested, keeps thinking: "I should've done this years ago".
https://code.visualstudio.com/docs/typescript/typescript-deb...
https://code.visualstudio.com/docs/nodejs/browser-debugging
The JS-to-TS mapping is handled through source map (so you're 'debugging' the TS code, even though it's JS under the hood).
(also, in case you're not aware, browsers have a builtin debugger in their devtool panel, these also have source map support, but this may require some tinkering)