module export in ts file is not a module error

Question

I have a config.ts and I do

module.exports = { something: 123 }

when I import like import { something } from './config.ts' I got error of config.ts' is not a module, what's the issue? my typescript is configured rightly and it's working in other places.

Answer 1

If you're using import { something } from './config.ts', you're using JavaScript modules, but your code in config.ts is using CommonJS modules. Some bundlers and such may let you mix them, but it's best not to.

To make config.ts a JavaScript module compatible with that import declaration (which expects a named export called something), change it to:

export const something = 123;

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Or, of course, to use config.ts via CommonJS, your code using it would be:

const { something } = require("./config.ts");

...but given the error you're getting, I think your project is set up to use JavaScript modules (import/export), which here in almost 2021 is probably best (now that we have dynamic import to handle the cases where static modules don't quite do the job).