promise-rejections.js

promise-rejections.js

Promise.reject(new Error());  // This will result in a rejection

new Promise((fulfill, reject) => {
  reject(new Error());  // This will result in a rejection
});

new Promise(() => {
  throw new Error();  // This will result in a rejection
});

Promise.resolve().then(() => {
  throw new Error();  // This will result in a rejection
});

Promise.reject().then(() => {}, () => {
  throw new Error();  // This will result in a rejection
});

Promise.reject().catch(() => {
  throw new Error();  // This will result in a rejection
});

Promise.resolve().finally(() => {
  throw new Error();  // This will result in a rejection
});

async function foo() {
  throw new Error();  // This will result in a rejection
}

async function bar(a) {
  if (a === undefined)
    a();  // This will result in a rejection
}