js 随机获取数组几个元素

`function randomArray(arr, count) {

    let shuffled = arr.slice(0); let i = arr.length; let min = i - count; let temp; let index; 

    while (i-- > min) {         index = Math.floor((i + 1) * Math.random());

        temp = shuffled[index]; 

        shuffled[index] = shuffled[i]; 

        shuffled[i] = temp;

        //console.log(shuffled);

    }

    return shuffled.slice(min);

}

var arry= ['101', '202', '103', '45', '65', '76', '77', '58', '59', '510'];

console.log( randomArray(items, 4) );`