How to create array from for loop with JavaScript?

To create array from for loop with JavaScript, we use the fill and map methods.

For instance, we write

const yearStart = 2000;
const yearEnd = 2040;
const years = Array(yearEnd - yearStart + 1)
  .fill()
  .map((_, i) => yearStart + i);

to create an array with length yearEnd - yearStart + 1 with Array.

Then we call fill to fill the empty slots with undefined.

And then we call map with a callback to map the undefined values to yearStart + i where i is the index of the array currently being looped through.