CodyC•3y ago

Lint for if you forgot to `await` a Promise?

If you have async methods that you call for their side effects, it's easy to forget to await them. Is there a lint rule that I can enable for that? (Sort of like Rust's rules about unused Results?) ex:

async myFn() {
    // code

    // oops, I forgot to await:
    doThing()

    // more code
    // fails at runtime because doThing()
    // hasn't finished yet.

}

async myFn() {
    // code

    // oops, I forgot to await:
    doThing()

    // more code
    // fails at runtime because doThing()
    // hasn't finished yet.

}

4 Replies

CodyCOP•3y ago

I've been searching/skimming https://lint.deno.land/ but don't see a relevant one yet.

Unknown User•3y ago

Message Not Public

CodyCOP•3y ago

Yeah, I knew about require-await, and it's enabled by default. (Which TBH I find a bit annoying. :p) Yeah, I know there are some times where you don't want to await the promise. But if you enable the lint, you could handle that by just creating a function like

function noAwait<T>(p: Promise<T>): void {}

function noAwait<T>(p: Promise<T>): void {}

To explicitly mark cases you don't want to wait for. (which is almost never in my admittedly limited experience)

dandv•2w ago

Maybe typescript-eslint works in Deno nowadays

I'm also trying to figure out how! https://stackoverflow.com/questions/79354265/using-typescript-eslint-with-deno

Stack Overflow

Using typescript-eslint with Deno

typescript-eslint recommends using "dual-linting" with Deno... using those linters for what they support, then adding in ESLint for typed linting in a parallel or second step ...but doe...

Lint for if you forgot to `await` a Promise?

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