---
url: /docs/guide/usage/linter/rules/unicorn/no-single-promise-in-promise-methods.md
---

### What it does

Disallow passing single-element arrays to `Promise` methods.

### Why is this bad?

Passing a single-element array to `Promise.all()`, `Promise.any()`, or
`Promise.race()` is likely a mistake.

### Examples

Examples of **incorrect** code for this rule:

```javascript
async function bad() {
  const foo = await Promise.all([promise]);
  const foo = await Promise.any([promise]);
  const foo = await Promise.race([promise]);
  const promise = Promise.all([nonPromise]);
}
```

Examples of **correct** code for this rule:

```javascript
async function good() {
  const foo = await promise;
  const promise = Promise.resolve(nonPromise);
  const foo = await Promise.all(promises);
  const foo = await Promise.any([promise, anotherPromise]);
  const [{ value: foo, reason: error }] = await Promise.allSettled([promise]);
}
```

## How to use

## Version

This rule was added in v0.2.18.

## References