JS Method of Randomly Extracting Several Array Elements from an Array

JS How to randomly fetch an element or several elements from an array.

If the array is

var items = ['1','2','4','5','6','7','8','9','10'];

1. Randomly fetch 1 element from the array items

var item = items[Math.floor(Math.random()*items.length)];

2. Randomly take several elements from the random array in the previous article

function getRandomArrayElements(arr, count) {
var shuffled = arr.slice(0), i = arr.length, min = i - count, temp, index;
while (i-- > min) {
index = Math.floor((i + 1) * Math.random());
temp = shuffled[index];
shuffled[index] = shuffled[i];
shuffled[i] = temp;
}
return shuffled.slice(min);
}
var items = ['1','2','4','5','6','7','8','9','10'];
console.log( getRandomArrayElements(items, 4) );