Polyfill for Array.prototype.fill.
$ npm install --save-dev array-fill
Functionally:
var fill = require('array-fill');
console.log(fill([1, 2, 3], 4));
// => [ 4, 4, 4 ]
console.log(fill([1, 2, 3], 4, 1));
// => [ 1, 4, 4 ]
From Array object:
require('array-fill/shim');
var array = [1, 2, 3];
array.fill(4, -3, -2);
console.log(array);
// => [ 4, 2, 3 ]