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Neither Javascript nor Typescript require semicolon, it is entirely a stylistic choice except in very rare circumstances that do not come up in normal code.

[-] Lemminary@lemmy.world 10 points 23 hours ago* (last edited 23 hours ago)

Explanation for nerdsThe reason is the JS compiler removes whitespace and introduces semicolons only "where necessary".

So writing

function myFn() {
  return true;
}

Is not the same as

function myFn() {
  return 
    true;
}

Because the compiler will see that and make it:

function myFn() { return; true; }

You big ol' nerd. Tee-hee.

[-] Ephera@lemmy.ml 7 points 23 hours ago

That's terrifying, especially in JS where no type system will fuck you up for returning nothing when you should've returned a boolean.

[-] exu@feditown.com 3 points 20 hours ago
[-] Lemminary@lemmy.world 1 points 18 hours ago

Not wrong, but funnily enough, it's a linting rule win. I'd go nuts if I didn't have my type checks and my linters. My current L, though, is setting up the projects initially and dealing with the configuration files if I raw dog it, but that's a problem with ESLint configs and the ecosystem as a whole having to deal with those headaches. So in the end, the JS devs got clever and shifted the blame to the tooling. ๐Ÿ˜…

[-] Maiq@lemy.lol 4 points 1 day ago

That's good to know. Don't know how I didn't know this. Been writing JS since 2000. Always just used them I guess. Ecmascripts look funny to me without them

[-] ScintillatingStruthio@programming.dev 1 points 1 hour ago* (last edited 1 hour ago)

Fair enough, I like it better without but I don't have a strong preference and have no issue adapting to whatever the style of the repo is.

I learned about it researching tools to automatically enforce formatting style and came across StandardJS, which eliminates them by default.

[-] Maiq@lemy.lol 1 points 49 minutes ago

I can see the benefit of matching style when working with others. I only code for myself and never had to worry about conformity for project consistency.

It is good to learn new things.

I'm sure I have some coding habitats that would annoy others.

[-] Lemminary@lemmy.world 3 points 23 hours ago

Same here. My brain interprets them as one long run-on sentence and throws a parsing error.

[-] Ephera@lemmy.ml 2 points 23 hours ago

Hmm, a webdev colleague said he'd normally prefer without semicolons, but used them anyways for better compile errors.

Interesting, I'm not aware of any way they would affect compile errors. I'd be curious to know more.

this post was submitted on 14 Aug 2025
291 points (96.2% liked)

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