//one line solution
shuffle = (array) => array.sort(() => Math.random() - 0.5);


//Demo
let arr = [1, 2, 3];
shuffle(arr);
alert(arr);

https://javascript.info/task/shuffle

Math.random（）-0.5是一个随机数，可以是正数或负，所以排序函数会随机地重新排序元素。

 const arr = [
  { index: 0, value: "0" },
  { index: 1, value: "1" },
  { index: 2, value: "2" },
  { index: 3, value: "3" },
];
let shuffle = (arr) => {
  let set = new Set();
  while (set.size != arr.length) {
    let rand = Math.floor(Math.random() * arr.length);
    set.add(arr[rand]);
  }
  console.log(set);
};
shuffle(arr);

对CoolAJ86答案的简单修改，不修改原始数组：

 /**
 * Returns a new array whose contents are a shuffled copy of the original array.
 * @param {Array} The items to shuffle.
 * https://stackoverflow.com/a/2450976/1673761
 * https://stackoverflow.com/a/44071316/1673761
 */
const shuffle = (array) => {
  let currentIndex = array.length;
  let temporaryValue;
  let randomIndex;
  const newArray = array.slice();
  // While there remains elements to shuffle...
  while (currentIndex) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;
    // Swap it with the current element.
    temporaryValue = newArray[currentIndex];
    newArray[currentIndex] = newArray[randomIndex];
    newArray[randomIndex] = temporaryValue;
  }
  return newArray;
};

我自己写了一个shuffle函数。这里的区别是它永远不会重复一个值（检查代码）：-

function shuffleArray(array) {
 var newArray = [];
 for (var i = 0; i < array.length; i++) {
     newArray.push(-1);
 }

 for (var j = 0; j < array.length; j++) {
    var id = Math.floor((Math.random() * array.length));
    while (newArray[id] !== -1) {
        id = Math.floor((Math.random() * array.length));
    }

    newArray.splice(id, 1, array[j]);
 }
 return newArray; }

函数shuffleArray（数组）{//在参数中创建具有给定数组长度的新数组const newArray=array.map（（）=>null）；//创建一个新数组，其中每个索引都包含索引值const arrayReference=array.map（（项，索引）=>索引）；//对参数中给定的数组进行迭代array.forEach（随机化）；return newArray；函数随机化（项）{const randomIndex=getRandomIndex（）；//替换新数组中的值newArray[arrayReference[randomIndex]]=项；//在数组引用中删除使用的索引arrayReference拼接（randomIndex，1）；}//返回介于0和当前数组引用长度之间的数字函数getRandomIndex（）{常量最小值=0；const max=arrayReference.length；return Math.floor（Math.random（）*（max-min））+min；}}控制台日志（shuffleArray（[10,20,30,40,60,70,80,90100]）；

var shuffle = function(array) {
   temp = [];
   originalLength = array.length;
   for (var i = 0; i < originalLength; i++) {
     temp.push(array.splice(Math.floor(Math.random()*array.length),1));
   }
   return temp;
};