July 2020 archive

Testing Lazy Loading of Embedded iFrames

This post is to test the lazy loading of iFrames, as noted in this blog post from David Walsh.

I’m first going to just embed a video without the lazy loading:

To make this work, I’m using a HTML block in the WordPress editor so that I can put in the exact iframe copied from YouTube.

Next I’m going to run a couple of speed tests on this published post.

Then, I’ll come back and add ‘loading=”lazy”‘ into the iFrame code and repeat the tests. Let’s see what we learn!