When a Promise
needs to only "resolve" or "reject", it’s more efficient and readable to use the methods specially created for such use
cases: Promise.resolve(value)
and Promise.reject(error)
.
Noncompliant Code Example
let fulfilledPromise = new Promise(resolve => resolve(42));
let rejectedPromise = new Promise(function(resolve, reject) {
reject('fail');
});
Compliant Solution
let fulfilledPromise = Promise.resolve(42);
let rejectedPromise = Promise.reject('fail');