javascript array keys In JavaScript

https://docs.vultr.com/javascript/standard-library/Array/keys

javascript array keys In JavaScript, the keys() method returns an array iterator object that contains the keys (or indexes) of an array. You can use this method to loop through the indexes of an array.

Syntax:

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array.keys();

It returns an iterator that you can use with loops like for...of.

for (let key of keys) {