Fisher Yates implementation ES6

"use strict";
// simple fisher yates implementation
const shuffle = (deck) => {
  let randomizedDeck = [];
  let array = deck;
  while ( array.length !== 0) {
  	let rIndex = Math.floor(array.length * Math.random());
    randomizedDeck.push(array[rIndex]);
    array.splice(rIndex, 1)
  }
  return randomizedDeck;
};

const deck = [1,2,3,4,5,6,7];
// Testing
console.log(shuffle(deck));