Questions
4 of 4
1Create a polyfill for Promise.all().
2Write a polyfill for Promise.race().
3Write a polyfill to implement Array.map()
4Write a polyfill for Array.flat(depth).
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Polyfills
04 / 04

Write a polyfill for Array.flat(depth).

The flat(depth) method of Array instances creates a new array with all sub-array elements concatenated into it recursively up to the specified depth.

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