Lazy loading加载没有缓冲,滚动即会触发新的图片资源加载。 Lazy loading加载在窗口resize尺寸变化时候也会触发,例如屏幕高度从小变大的时候。 Lazy loading加载也有可能会先加载后面的图片资源,例如页面加载时滚动高度很高的时候。 参考链接 Lazy loading - Web 性能 | MDN Lazy loading via attribute for images & ...
In this lesson, you'll learn how to use theloading="lazy"attribute available on images and iframes to lazily load below the fold images, which saves bandwidth and increases the load time performance of web pages. You'll also learn how to prevent images from lazy loading if necessary, and ...
loading="lazy" loading="eager" lazy 懒加载,即:延迟获取资源。 eager 立即加载,即:默认状态。 Lazy loading via attribute for images & iframes (图像和iframe的Lazy loading属性) 具体浏览器支持可以参考caniuse查询,此属性也可以应用在<iframe>标签上 The loading attribute on images & iframes gives author...
所以通常会使用图片懒加载(image lazy loading)技术。 基于IntersectionObserver API 的方式 我在文章《IntersectionObserver API 的使用、元素相交/可见性判断 及 图片惰性加载的实现》里面提到了使用 IntersectionObserver API 来计算两个 HTML 元素是否相交。 “相交”的含义,即出现在了浏览器的可视区域。 判断相交可以做...
auto: Default lazy-loading behavior of the browser, which is the same as not including the attribute. lazy: Defer loading of the resource until it reaches acalculated distancefrom the viewport. eager: Load the resource immediately, regardless of where it's located on the page. ...
Step 1. Using Native Lazy Loading Add theloadingattribute to<img>tags html<img src="image.jpg"alt="Lazy Loaded Image"loading="lazy"> Step 2. Using JavaScript with Intersection Observer HTML Structure: html<imgclass="lazy"data-src="image.jpg"alt="Lazy Loaded Image"> ...
Step 1. Using Native Lazy Loading Add the loading attribute to <img> tags html <img src="image.jpg" alt="Lazy Loaded Image" loading="lazy"> Step 2. Using JavaScript with Intersection Observer HTML Structure: html <img class="lazy" data-src="image.jpg" alt="Lazy Loaded Image"> 3. ...
iframe tags can include the same HTML loading attribute described above for images. What are the advantages of lazy loading? Faster page load: All else being equal, webpages with smaller file sizes load faster. With lazy loading, a webpage starts off smaller than its full size and thus ...
html In this lesson, you'll learn how to use theloading="lazy"attribute available on images and iframes to lazily load below the fold images, which saves bandwidth and increases the load time performance of web pages. You'll also learn how to prevent images from lazy loading if necessary,...
<img src="image.jpg" loading="lazy" alt="Lazy loaded image"> Markup Copy This will load the image only when it comes into the viewport 2. Lazy Loading Iframes Similarly, you can lazy load iframes using the loading attribute: <iframe src="video.html" loading="lazy"></iframe> Markup ...