text 仅使用css我们可以有效地预加载图像。来自：https：//perishablepress.com/pure-css-better-image-preloading-without-java

Posted 2021-05-02

/* ADD THIS TO CSS */
<style>
div#preloaded-images {
   position: absolute;
   overflow: hidden;
   left: -9999px; 
   top: -9999px;
   height: 1px;
   width: 1px;
}
</style>

<!-- ADD THIS TO XHTML -->
<div id="preloaded-images">
   <img src="https://perishablepress.com/image-01.png" width="1" height="1" alt="Image 01" />
   <img src="https://perishablepress.com/image-02.png" width="1" height="1" alt="Image 02" />
   <img src="https://perishablepress.com/image-03.png" width="1" height="1" alt="Image 03" />
</div>