var items = Array(523,3452,334,31,...5346);

function rand(min, max) {
  var offset = min;
  var range = (max - min) + 1;

  var randomNumber = Math.floor( Math.random() * range) + offset;
  return randomNumber;
}


randomNumber = rand(0, items.length - 1);

randomItem = items[randomNumber];

信贷:

Javascript函数:随机数生成器

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

const ArrayRandomModule = {
  // get random item from array
  random: function (array) {
    return array[Math.random() * array.length | 0];
  },

  // [mutate]: extract from given array a random item
  pick: function (array, i) {
    return array.splice(i >= 0 ? i : Math.random() * array.length | 0, 1)[0];
  },

  // [mutate]: shuffle the given array
  shuffle: function (array) {
    for (var i = array.length; i > 0; --i)
      array.push(array.splice(Math.random() * i | 0, 1)[0]);
    return array;
  }
}

1. 解决方案:定义数组原型

Array.prototype.random = function () {
  return this[Math.floor((Math.random()*this.length))];
}

这将在内联数组上工作

[2,3,5].random()

当然还有预定义数组

var list = [2,3,5]
list.random()

2. 解决方案:定义接受列表并返回元素的自定义函数

function get_random (list) {
  return list[Math.floor((Math.random()*list.length))];
}


get_random([2,3,5])

还有另一种方法:

function rand(items) {
    // "~~" for a closest "int"
    return items[~~(items.length * Math.random())];
}

或者按照下面@1248177的建议:

function rand(items) {
    // "|" for a kinda "int div"
    return items[items.length * Math.random() | 0];
}

使用下划线(或loDash:)):

var randomArray = [
   '#cc0000','#00cc00', '#0000cc'
];

// use _.sample
var randomElement = _.sample(randomArray);

// manually use _.random
var randomElement = randomArray[_.random(randomArray.length-1)];

或者洗牌整个数组:

// use underscore's shuffle function
var firstRandomElement = _.shuffle(randomArray)[0];