js随机排列图片顺序

短命女 2022-01-28 00:25 218阅读 0赞

## 随机排列 ##

css
     * {
                margin: 0;
                padding: 0;
            }
    
            ul {
                width: 810px;
                margin: 0 auto;
                position: absolute;
    
    
            }
    
            input {
                margin-top: 30px;
                width: 100px;
                height: 30px;
                line-height: 30px;
                border: 1px solid #ccc;
                background: #009999;
                color: #fff;
    
            }
    
    
    
            li {
                margin-top: 50px;
                list-style: none;
                width: 200px;
                height: 300px;
                text-align: center;
                float: left;
            }
    
            img {
                width: 200px;
                height: 280px;
            }
    
            .clearFix::before .clearFix::after {
                content: '';
                clear: both;
                display: block;
                line-height: 0;
            }

html
 <input type="button" value="从大到小" />
 <input type="button" id="btn" value="随机排序" />
 <ul>
 <li>
 <img src="./img/1.jpg" alt="">
 图片1
 </li>
 <li>
 <img src="./img/2.jpg" alt="">
 图片2
 </li>
 <li>
 <img src="./img/3.jpg" alt="">
 图片3
 </li>
 
 <li>
 <img src="./img/4.jpg" alt="">
 图片4
 </li>
 <li>
 <img src="./img/5.jpg" alt="">
 图片5
 </li>
 <li>
 <img src="./img/6.jpg" alt="">
 图片6
 </li>
 <li>
 <img src="./img/7.jpg" alt="">
 图片7
 </li>
 <li>
 <img src="./img/8.jpg" alt="">
 图片8
 </li>
 </ul>

js
 var btn = document.getElementById('btn');
 var aLi = document.getElementsByTagName('li');
 var Inp = document.getElementsByTagName('input');
 var Img = document.getElementsByTagName('img');
 var oP = document.getElementsByTagName('p');
 var url = ['./img/1.jpg', './img/2.jpg', './img/3.jpg', './img/4.jpg', './img/5.jpg', './img/6.jpg', './img/7.jpg', './img/8.jpg'];
 var tit = ['图片01', '图片02', '图片03', '图片04', '图片05', '图片06', '图片07', '图片08'];
 var num = [0, 1, 2, 3, 4, 5, 6, 7];
 Inp[0].off = true
 // 从大到小
 Inp[0].onclick = function () {
 if (this.off) {
 num.sort(function (a, b) { return b - a })
 str();
 Inp[0].off = false
 } else {
 // 从小到大
 num.sort(function (a, b) { return a - b })
 str();
 Inp[0].off = true;
 }
 function str() {
 for (var i = 0; i < aLi.length; i++) {
 Img[i].src = url[num[i]]
 oP[i].innerHTML = tit[num[i]]
 }
 }
 }
 // 随机顺序
 btn.onclick = function () {
 var no = [];
 while (no.length < url.length) {
 var ou = parseInt(Math.random() * url.length);
 if (no.indexOf(ou) == -1) {
 no.push(ou);
 
 }
 }
 for (var i = 0; i < aLi.length; i++) {
 Img[i].src = url[no[i]];
 oP[i].innerHTML = tit[no[i]];
 }
 }

效果图  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0eWxlMjAxOTA0_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0eWxlMjAxOTA0_size_16_color_FFFFFF_t_70]: /images/20220128/00134e953c1a4dd289ef9309208aca5f.png