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Requires Promise-like values to be handled appropriately (no-floating-promises)

This rule forbids usage of Promise-like values in statements without handling their errors appropriately. Unhandled promises can cause several issues, such as improperly sequenced operations, ignored Promise rejections and more. Valid ways of handling a Promise-valued statement include awaiting, returning, and either calling .then() with two arguments or .catch() with one argument.

Rule Details

Examples of incorrect code for this rule:

const promise = new Promise((resolve, reject) => resolve('value'));
promise;

async function returnsPromise() {
  return 'value';
}
returnsPromise().then(() => {});

Promise.reject('value').catch();

Examples of correct code for this rule:

const promise = new Promise((resolve, reject) => resolve('value'));
await promise;

async function returnsPromise() {
  return 'value';
}
returnsPromise().then(() => {}, () => {});

Promise.reject('value').catch(() => {});

When Not To Use It

If you do not use Promise-like values in your codebase or want to allow them to remain unhandled.

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