#await-thenable

#Configuration

import { defineConfig, ts } from '@rslint/core';

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/await-thenable': 'error',
    },
  },
]);

#Rule Details

Disallow awaiting a value that is not a Thenable (Promise-like). Using await on a non-Promise value is almost always a programmer error and has no effect at runtime, since await on a non-Thenable value simply returns it immediately.

This rule also checks for await...of loops for non-async iterables and await using declarations for non-async disposable values.

Examples of incorrect code for this rule:

async function foo() {
  await 42;
}

async function bar(x: number) {
  await x;
}

async function baz(arr: number[]) {
  for await (const item of arr) {
  }
}

Examples of correct code for this rule:

async function foo() {
  await Promise.resolve(42);
}

async function bar(x: Promise<number>) {
  await x;
}

async function baz(iter: AsyncIterable<number>) {
  for await (const item of iter) {
  }
}

#Original Documentation

• typescript-eslint await-thenable