问题描述
我需要预加载在 <picture> 标签中设置的响应式图片：
<picture>
<source sizes="(max-width: 320px) 320px,(max-width: 480px) 480px,(max-width: 768px) 768px,>(max-width: 1024px) 1024px,(max-width: 1200px) 1200px,1500px" srcset="home-image1-bis2-1200x640.webp 1200w,home-image1-bis2-1024x546.webp 1024w,home-image1-bis2-768x410.webp 768w,home-image1-bis2-480x256.webp 480w,home-image1-bis2-320x171.webp 320w,home-image1-bis2.webp 1500w" type="image/webp"> </picture>
我找到了这个链接：https://web.dev/preload-responsive-images/
所以我尝试在下面应用它：
<link rel="preload" href=home-image1-bis2-320x171.webp" as="image" type="image/webp" media="(max-width: 320px)">
<link rel="preload" href="home-image1-bis2-480x256.webp" as="image" type="image/webp" media="(min-width: 320.1px) and (max-width: 480px)">
<link rel="preload" href="home-image1-bis2-768x410.webp" as="image" type="image/webp" media="(min-width: 480.1px) and (max-width: 768px)">
``<link rel="preload" href="home-image1-bis2-1024x546.webp" as="image" type="image/webp" media="(min-width: 768.1px) and (max-width: 1024px)">
<link rel="preload" href="home-image1-bis2-1024x546.webp" as="image" type="image/webp" media="(min-width: 1024.1px) and (max-width: 1200px)">
``<link rel="preload" href="home-image1-bis2.webp" as="image" type="image/webp" media="(min-width: 1200.1px)">
我不确定它是否有效...
我现在在控制台中有这个通知：
The resource home-image1-bis2-480x256.webp was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate 作为 value and it is preloaded intentionally.
这对这张图片的 LCP 没有影响。
有人知道怎么做吗？
非常感谢！
解决方法
您可以在此用例中使用 function searchForWaldo(arrayOfNames) {
return containsWaldo(arrayOfNames) ? 'I found waldo!' ? 'I couldn't find waldo...'
}
和 imagesrcset 属性：
imagesizes见https://html.spec.whatwg.org/multipage/semantics.html#attr-link-imagesrcset
和https://html.spec.whatwg.org/multipage/semantics.html#attr-link-imagesizes