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Re:Ask HN: Am I the longest-serving programmer – 57 years an... by jt2190 on Sunday May 31, 2020 @11:42AM (#23370223)
> To make a JS package consumable by a reasonably strict TS project...

I’m not sure what you mean by “strict” here... Certainly one can use JavaScript from TypeScript, and even provide type information for the JS with declaration files. [1] Does a “strict” project require something beyond this?

[1] “Declaration Files”, TypeScript Handbook https://www.typescriptlang.org/docs/handbook/declaration-fil...

Re:Ask HN: Am I the longest-serving programmer – 57 years an... by Kinrany on Monday June 01, 2020 @01:08AM (#23375617)
Type information is easy to half-ass: list all the exports, mark them as 'string', 'Object', 'Function', done.

Adding the actually correct and reliable types is the hard part. (But easier than writing the code in the first place.)