Lazy-loading placeholder (lazysizes) HTML
A HTML snippet for Lazy-loading placeholder (lazysizes) that answers requests for /pixel.gif with the empty GIF, decoded once at startup.
Lazy-loading placeholder (lazysizes) HTML
<!-- The empty GIF keeps src valid until lazysizes swaps in data-src.
(For most pages today, native loading="lazy" is enough.) -->
<img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
data-src="/images/photo.jpg" class="lazyload"
width="800" height="600" alt="A photo">
We ran this snippet and compared the bytes it returned.
Official site: Lazy-loading placeholder (lazysizes)