subbed•17h ago

deno check does not accept noImplicitReturns

hello. i have the following config inside deno.json:

{
  "compilerOptions": {
    "strict": true,
    "noImplicitReturns": true
  },
  ...
}

{
  "compilerOptions": {
    "strict": true,
    "noImplicitReturns": true
  },
  ...
}

running deno check still allows function signatures without the return type. how can i enforce the deno check to fail if no return type is present?

8 Replies

subbed•17h ago

for example, deno check does not error on the following, even though the Response return type is not provided:

const rootHandler = (ctx: Context) => {
  return ctx.json({ shade: "?", random: randomInt(0, 256) });
};

const rootHandler = (ctx: Context) => {
  return ctx.json({ shade: "?", random: randomInt(0, 256) });
};

please ping me if you reply to this post, thank you

bartlomieju•12h ago

@subbed could you please open an issue in Deno repo about it? It looks like a bug

subbed•12h ago

opened: https://github.com/denoland/deno/issues/26265

GitHub

deno check does not enforce noImplicitReturns · Issue #26265 · deno...

deno 2.0.0 (stable, release, x86_64-unknown-linux-gnu) v8 12.9.202.13-rusty typescript 5.6.2 deno check seemigly does not enforce the noImplicitReturns clause. Having the following deno.json snippe...

bartlomieju•12h ago

Thank you :deno_thankyou:

Danyil•11h ago

as temporary workaround you can use biome.js along with deno lint

subbed•11h ago

i have used biome for quite a while now. regardless, it is an additional config file on the root, so a fix would be appreciated

Danyil•11h ago

as i said, temporary

subbed•11h ago

correct, and as i said, i have been using it thus far. thank you for your recommendation regardless