Promiseallintermediate

Promise.all — returns Promise for any iterable

📖 Usage Example

const p1 = Promise.resolve(1)
const p2 = Promise.resolve(2)
Promise.all([p1, p2]).then(values => {
  console.log(values) // → [1, 2]
})

Promise.all() waits for all promises to resolve and returns their values as an array.

Promise.all() Various Inputs

Promise.all([]) instanceof Promise and Promise.all([1,2].map(Promise.resolve, Promise)) instanceof Promise.

Challenge: Verify Promise.all is always a Promise.

💡 Hints (1)

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