promise/valid-params

Promise methods don't complain about extra or missing arguments. Promise.all(a, b) ignores b, and rejects unless a is iterable. promise.catch() without a handler catches nothing.

Method	Arguments
Promise.resolve, Promise.reject	0 or 1
Promise.all, Promise.allSettled, Promise.any, Promise.race	1
then	1 or 2
catch, finally	1

A then, catch or finally method on something that clearly isn't a promise, such as an object literal or new Parser(), isn't reported.

Configure

Off by default. To turn it on:

[lint.rules]
"promise/valid-params" = "error" # or "warn"

Examples

Reported:

const results = Promise.all(loadUser(), loadOrders());

save(draft).then().catch();

Not reported:

const results = Promise.all([loadUser(), loadOrders()]);

save(draft).then(notify, retry).catch(showError);

const parser = new Parser();
parser.then();