如何使我的图像按随机顺序循环

Question

我知道math.random((选项存在，但我不知道如何在代码中使用它。目前，它正在以排序的方式循环。

(function () {
var rotator = document.getElementById("rotator"); // change to match image ID
var imageDir =
"/Users/loh/Documents/ElectronJS/newapp1/newapp1/pages/images/visionboard/";
var delayInSeconds = 1;
var num = 0;
let currentIndex = 0;
const totalImages = 16;
const changeImage = function () {
num = ++num % totalImages;
rotator.src = imageDir  + num + ".png";
};
setInterval(changeImage, delayInSeconds * 1000);
})();

Answer 1

(function () {
var rotator = document.getElementById("rotator"); // change to match image ID        
var imageDir =
"/Users/loh/Documents/ElectronJS/newapp1/newapp1/pages/images/visionboard/";
var delayInSeconds = 1;
var num = 0;
let currentIndex = 0;
const totalImages = 16;
const changeImage = function () {
var incre = Math.floor(Math.random() * (totalImages-1) ) + 1;
num += incre;
num = num % totalImages;
rotator.src = imageDir  + num + ".png";
};
setInterval(changeImage, delayInSeconds * 1000);
})();