swiper在动态创建dom过程中的问题：数据从后端请求回来后加载到页面上，dom加载完发现swiper没用了

news2025/7/19 6:24:00

怎么动态创建div标签：

要轮播的数据是后端返回的，所以我们要发ajax请求接收数据；

下面演示的是已经接收回来的数据，动态创建div标签：

    setTimeout(()=>{
            var list = ["aaa","bbb","ccc"]//后端返回的数据
            var newlist= list.map(item => `<div class="swiper-slide">${item}</div>`)
            var owrapper = document.querySelector(".swiper-wrapper")
            owrapper.innerHTML = newlist.join('')

        },2000)

完整代码：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./swiper/swiper-bundle.min.css">
    <script src="./swiper/swiper-bundle.min.js"></script>
    <style>
        .swiper {
            width: 600px;
            height: 300px;
            background-color: yellow;
        }
    </style>
</head>

<body>
    <header>导航</header>

    <div class="swiper">
        <div class="swiper-wrapper">
            <!-- <div class="swiper-slide">11111</div>
            <div class="swiper-slide">22222</div>
            <div class="swiper-slide">33333</div> -->
        </div>
        <!-- 如果需要分页器 -->
        <div class="swiper-pagination"></div>

        <!-- 如果需要导航按钮 -->
        <div class="swiper-button-prev"></div>
        <div class="swiper-button-next"></div>

        <!-- 如果需要滚动条 -->
        <div class="swiper-scrollbar"></div>
    </div>

    <footer>底部内容</footer>

    <script>
        setTimeout(()=>{
            var list = ["aaa","bbb","ccc"]//后端返回的数据
            var newlist= list.map(item => `<div class="swiper-slide">${item}</div>`)
            var owrapper = document.querySelector(".swiper-wrapper")
            owrapper.innerHTML = newlist.join('')

        },2000)
        
        new Swiper(".swiper", {
            // direction: 'vertical', // 垂直切换选项
            loop: true, // 循环模式选项

            // 如果需要分页器
            pagination: {
                el: '.swiper-pagination',
            },

            // 如果需要前进后退按钮
            navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
            },

            // 如果需要滚动条
            scrollbar: {
                el: '.swiper-scrollbar',
            },
        })
    </script>
</body>

</html>

结果：

在动态创建完dom的问题：

动态创建完dom之后，发现刚刚放入的轮播效果都没了？

原因是创建dom是定时器，需要2s以后才能创建好，此时的swiper都初始化完了，没找的dom，所以原因是：swiper初始化过早；

解决办法：dom插入完之后，再new swiper；

就是把new swiper放到函数里面，在定时器里去调用：

代码：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./swiper/swiper-bundle.min.css">
    <script src="./swiper/swiper-bundle.min.js"></script>
    <style>
        .swiper {
            width: 600px;
            height: 300px;
            background-color: yellow;
        }
    </style>
</head>

<body>
    <header>导航</header>

    <div class="swiper">
        <div class="swiper-wrapper">
            <!-- <div class="swiper-slide">11111</div>
            <div class="swiper-slide">22222</div>
            <div class="swiper-slide">33333</div> -->
        </div>
        <!-- 如果需要分页器 -->
        <div class="swiper-pagination"></div>

        <!-- 如果需要导航按钮 -->
        <div class="swiper-button-prev"></div>
        <div class="swiper-button-next"></div>

        <!-- 如果需要滚动条 -->
        <div class="swiper-scrollbar"></div>
    </div>

    <footer>底部内容</footer>

    <script>
        setTimeout(()=>{
            var list = ["aaa","bbb","ccc"]//后端返回的数据
            var newlist= list.map(item => `<div class="swiper-slide">${item}</div>`)
            var owrapper = document.querySelector(".swiper-wrapper")
            owrapper.innerHTML = newlist.join('')

            //dom加载完成，再初始化swiper
            init()
        },2000)

        function init(){
            new Swiper(".swiper", {
            // direction: 'vertical', // 垂直切换选项
            loop: true, // 循环模式选项

            // 如果需要分页器
            pagination: {
                el: '.swiper-pagination',
            },

            // 如果需要前进后退按钮
            navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
            },

            // 如果需要滚动条
            scrollbar: {
                el: '.swiper-scrollbar',
            },
        })
        }
    </script>
</body>

</html>

结果：