JS从一个数组中随机取出几个元素出来

老规矩，话不多说直接上代码：

JS从一个数组中随机取出元素出来

var items = ['1','2','4','5','6','7','8','9','10'];
1.从数组items中随机取出一个元素
var item = items[Math.floor(Math.random()*items.length)];
console.log(item);

2.从一个数组中随机取出几个元素出来
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) );