Dear JavaScript,

"TypeError: Object(...)(...) is undefined" is not a helpful error message.

Sincerely,

Me

Oh god debugging JavaScript. Easily the worst thing I’ve had to do as a dev. Complain all you want about c++ errors, at least it actually gives you something to work with. JavaScript errors means an hour or two of debugging with no help from the interpreter

you should try

console.log(typeof null);

@10Dev debugging javascript is hours of pain...debugging front end in general

undefined

But you guys know that there is a so called stack trace? Telling you exactly where the error originated from.

@nitwhiz Exactly! Thanks for pointing this out.

As @nitwhiz said. You look at stack trace, use a proper debugger and step back/forward. You'll soon know that the script itself is just a minified piece of shit if you can't debug it even with these powerful devtools.

Thats happens when you try to access multi-level object and its not even there.

Convert to typescript then 🤷🏼‍♀️ then you’ll have more info

@bashleigh TS also produces some wildly unhelpful error messages though. Granted, it’s a mountain of an improvement from JS

@ostream Don't entangle me in frameworks bs. Tools are just fine. I was talking more about the choices made *before* you that led to debugging, like someone not following the docs and writing total mess.
Debugging becomes an opt-in if TypeScript is in place 👌