iframe for YouTube embed: lazy loading doesn't work in Firefox
My system is Firefox 79, Windows 10. Lazy loading is supported in Firefox since version 75: https://caniuse.com/#feat=loading-lazy-attr
I found that this works on Firefox for lazy loading of images. However, YouTube embedding in an iframe, it doesn't work. I ensured that the video is long way below the fold. Even then, the iframe is loaded upfront. This is the HTML for the iframe:
<iframe loading="lazy" src="https://www.youtube.com/embed/iQBat7e0MQs" allowfullscreen="" width="480" height="270"></iframe>
On Chrome, lazy loading works as expected for the same web page (on my localhost).
Tất cả các câu trả lời (1)
Hi, it doesn't work on Firefox yet. You have to follow bug 1622090.