If you want to get a quick handle on what Typescript is all about, and you have experience with other programming languages, this post will give you a high-level overview of what is special about Typescript. Typescript’s take on type checking is unusually expressive compared to similarly popular type-checked languages. That’s because Javascript, being a dynamically typed language, is extremely flexible. Typescript is designed to let you write Javascript almost as freely as you normally would, but with accurate type-checking added on. Whether or not you have experience with type-checking in other languages, it is helpful to learn the particulars of the Typescript way…
  • Artwork@lemmy.worldEnglish
    41·
    4 months ago

    By Jesse Hallett, 6th Apr 2026, 35 min read, Tags: TypeScript, type theory…
    Source [web-archive]

    Thank you very much!

    Though… 35 min read…? ~7000 words…? Type theory…? Is that the speed of mind of 2026…?

    • hallettj@leminal.spaceOPEnglish
      31·
      4 months ago

      It’s intended to acquaint one with the language, and there is a lot do that. I don’t know what is the right way to write this kind of stuff; but my thinking was if I were learning I’d rather start with this kind of piece before getting into a book.

  • SchwertImStein@lemmy.dbzer0.comEnglish
    2·
    4 months ago

    Seems ok.

    I’ll post critique because it is easier:

    • atrocious code block font
    • some of non-code annotations are misaligned (on phone) e. g. nullable string
    • 5 is about Generics with emphasis on React. functions don’t “take two parameter lists”. Generic functions can have the type specified.
    • 6 is wrong. types cannot “be functions”. You can do some type algebra on types.