NodeJS Express server: SyntaxError: Invalid or unexpected token

Question

I have installed typescript in my project and it works fine on the frontend. on the backend I have a node express server. I've started implementing TS there. when I ran the server just now it failed with:

filename: (req: Request, file, cb) => {

SyntaxError: Invalid or unexpected token (pointing at the :)

How can I make TS work on the server?

I've installed esm which allows me to use imports, I've also included: "module": "commonjs" in the package.json

how do I fix this?

Are you trying to use typescript? Or are you trying to rename `req` into `Request`? — evolutionxbox, Jan 12 '22 at 14:21
I don’t use typescript yet but filename is not a type, it’s a variable name so wouldn’t you use =? — Peter, Jan 12 '22 at 14:22

score 2 · Answer 1 · answered Jan 12 '22 at 14:22

2

You have to compile the TypeScript into JavaScript (e.g. with tsc) and then run the resulting JavaScript with Node.js (which doesn't have native support for TypeScript).

Alternatively, look at ts-node.

answered Jan 12 '22 at 14:22

Quentin

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NodeJS Express server: SyntaxError: Invalid or unexpected token

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