Use shorthand promise methodsJS-C1004

If the executor argument to a promise constructor only calls the reject or resolve and exits, then the code can refactored to use Promise#reject or Promise#resolve instead.

Bad Practice

new Promise((resolve, reject) => {
  resolve(getItem())
})

new Promise(function (resolve, reject) {
  reject("oops")
})

Recommended

Promise.resolve(getItem())
Promise.reject("oops")