this post was submitted on 15 Aug 2023
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No Stupid Questions (Developer Edition)

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New to Javascript here, what does Javascript and Typescript have in common ? (jlai.lu)
submitted 1 year ago by [email protected] to c/[email protected]
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Do I master Typescript if I master Javascript ? Is Typescript syntax different ? Answers appreciated, thank you !

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[–] [email protected] -4 points 1 year ago (2 children)

TypeScript is a superset of JavaScript. It means any valid JavaScript is also valid TypeScript.

This is backwards. JS is superset and all TS compiles to valid JS.

The vast majority of JS does not translate to Typescript as the JS is untyped.

[–] [email protected] 5 points 1 year ago

You don’t need to necessarily believe me but please double check your claims before you spread misinformation

[–] [email protected] 4 points 1 year ago (1 children)

To be a superset, all elements of the subset must be contained within the superset.

TypeScript is a superset of JavaScript as valid JS code(just with everything implicitly the any type) is valid TS code.

[–] [email protected] 0 points 1 year ago* (last edited 1 year ago)

Oh yeah if you add some sort of typing to the Javascript, sure.