Rule: no-async-without-await

Functions marked async must contain an await or return statement.

Rationale

Marking a function as async without using await or returning a value inside it can lead to an unintended promise return and a larger transpiled output. Often the function can be synchronous and the async keyword is there by mistake. Return statements are allowed as sometimes it is desirable to wrap the returned value in a Promise.

Config

Not configurable.

Config examples

"no-async-without-await": true

Schema

null

Code examples:

"rules": { "no-async-without-await": true }

async function f() {
    await fetch();
}

const f = async () => {
    await fetch();
};

const f = async () => {
    return 'value';
};

async function f() {
    fetch();
}

async function f() {
    async function g() {
        await h();
    }
}