Promise.all

Wait for multiple promises.

const p1 = Promise.resolve(3);
const p2 = 42;
const p3 = new Promise((resolve, reject) => {
  setTimeout(resolve, 100, 'foo');
});

Promise.all([p1, p2, p3]).then(values => {
  console.log(values); // [3, 42, "foo"]
});

js async promise

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