// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/fill#polyfill

if (!Array.prototype.fill) {

Object.defineProperty(Array.prototype, 'fill', {

value: function(value) {

// Steps 1-2.

if (this == null) {

throw new TypeError('this is null or not defined');

}

var O = Object(this);

// Steps 3-5.

var len = O.length >>> 0;

// Steps 6-7.

var start = arguments[1];

var relativeStart = start >> 0;

// Step 8.

var k = relativeStart < 0 ? Math.max(len + relativeStart, 0) : Math.min(relativeStart, len);

// Steps 9-10.

var end = arguments[2];

var relativeEnd = end === undefined ? len : end >> 0;

// Step 11.

var finalValue = relativeEnd < 0 ? Math.max(len + relativeEnd, 0) : Math.min(relativeEnd, len);

// Step 12.

while (k < finalValue) {

O[k] = value;

k++;

}

// Step 13.

return O;

}

});

}