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A comment on All I Want for Christmas Is These Seven TypeScript Improvements. Parent comment

Re:All I Want for Christmas Is These Seven TypeScript Improv... by janosdebugs on Sunday December 25, 2022 @11:28PM (#34134585)
How would Typescript do that while transpiling to JS? It would need to add a whole lot of boilerplate code to the generated JS, slowing the execution down.
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Re:All I Want for Christmas Is These Seven TypeScript Improv... by samtho on Monday December 26, 2022 @01:13AM (#34135143)
Does it not already do this? I don’t use TS if I have the choice due to all the runtime complexities, including the endless house-of-cards shimming it does to prop up all the features of TypeScript.
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Re:All I Want for Christmas Is These Seven TypeScript Improv... by consilient on Monday December 26, 2022 @01:25AM (#34135230)
No, typescript has full type erasure and almost no type-directed emit. The shimming you're seeing is probably the result of tsc downleveling newer javascript features to older browsers: typescript itself has nothing to do with it.

https://www.typescriptlang.org/tsconfig#target

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Re:All I Want for Christmas Is These Seven TypeScript Improv... by janosdebugs on Monday December 26, 2022 @03:28AM (#34135804)
Try running tsc in ES2020 mode, the output will be surprisingly clean JavaScript. Older versions include a lot of hacks for dynamic module loading, etc.
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Re:All I Want for Christmas Is These Seven TypeScript Improv... by chucklenorris on Monday December 26, 2022 @04:02PM (#34141836)
Something like typeinfo<T> being inlined into an object describing my type. Totally opt-in, no need for every type to be tracked at runtime.
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