#no-misused-promises

#Configuration

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

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/no-misused-promises': 'error',
    },
  },
]);

#Rule Details

Disallows Promises in places that are not designed to handle them. This rule catches common mistakes such as using a Promise in a conditional check (where it always evaluates to truthy), passing an async function as a callback where a void return is expected, spreading a Promise in an object, or returning a Promise-returning function where a void return is expected. The rule checks conditionals, void returns (arguments, properties, variables, inherited methods, attributes, and return statements), and object spreads.

Examples of incorrect code for this rule:

// Promise used in conditional (always truthy)
if (fetchData()) {
}

// Async function passed where void callback expected
[1, 2, 3].forEach(async n => {
  await doSomething(n);
});

// Spreading a Promise in an object
const obj = { ...fetchData() };

// Returning async function where void expected
const listeners = {
  onClick: async () => await handleClick(),
};

Examples of correct code for this rule:

if (await fetchData()) {
}

for (const n of [1, 2, 3]) {
  await doSomething(n);
}

const data = await fetchData();
const obj = { ...data };

const listeners = {
  onClick: () => {
    void handleClick();
  },
};

#Original Documentation

• typescript-eslint no-misused-promises