no-async-promise-executor

If the function you pass to new Promise is async and it throws, or something it awaits rejects, the new promise never hears about it. It stays pending forever, and a .catch() on it or a try around its await never sees the error.

An await in the executor also means that you already have a promise, so you rarely need new Promise at all.

This rule is on by default.

Configure

On by default as an error. To turn it off:

[lint.rules]
"no-async-promise-executor" = "off" # or "warn"

Examples

Reported:

const user = new Promise(async (resolve) => {
  const response = await fetch("/api/user");
  resolve(await response.json());
});

Not reported:

async function loadUser() {
  const response = await fetch("/api/user");
  return response.json();
}

const user = loadUser();