如果你只读每个人都在读的书，你也只能想到每个人都能想到的事。——村上春树
首先贴代码：
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> .ruben { width: 400px; height: 300px; background-color: #e8e8e8 } .ruben img { width: 100%; height: 100%; } </style> </head> <body> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3059_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3058_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3057_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3055_3.jpg"></div> <div class="ruben"><img src="https://VampireAchao.gitee.io/imgs/preview/3056_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3054_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3053_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3052_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3051_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3050_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3049_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3048_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3047_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3046_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3045_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3044_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3043_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3042_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3041_3.jpg"></div> <div class="ruben"><img data-src="https://VampireAchao.gitee.io/imgs/preview/3040_3.jpg"></div> <script type="text/javascript"> // 获取需要懒加载的元素 let lazyLoadImgs = document.querySelectorAll("img") function lazyLoad() { // 屏幕可视区域高度 let clientHeight = document.documentElement.clientHeight // 遍历图片 lazyLoadImgs.forEach(e => { if (!e.src) { // 获取元素界面信息(宽高位置等) let rect = e.getBoundingClientRect() if (rect.top < clientHeight) { // 如果当前图片处于可视区域,则将data-src中的值放入src e.src = e.dataset.src } } }) // 滚动时加载 window.onscroll ??= lazyLoad } lazyLoad() </script> </body> </html>
在你们自己的代码中使用方式也很简单：
首先复制这串js：
// 获取需要懒加载的元素 let lazyLoadImgs = document.querySelectorAll("img") function lazyLoad() { // 屏幕可视区域高度 let clientHeight = document.documentElement.clientHeight // 遍历图片 lazyLoadImgs.forEach(e => { if (!e.src) { // 获取元素界面信息(宽高位置等) let rect = e.getBoundingClientRect() if (rect.top < clientHeight) { // 如果当前图片处于可视区域,则将data-src中的值放入src e.src = e.dataset.src } } }) // 滚动时加载 window.onscroll ??= lazyLoad } lazyLoad()
然后在你们页面中使用，这里需要将你们原来页面上img标签的src改为data-src，这样在元素处于可视区域,则将data-src中的值放入src，然后达到懒加载的效果
