Adoption of iframe loading attribute

Similar to Adoption of img loading attribute, it would be helpful to gather insights on how many sites have adopted the loading attribute on iframe elements, including which attribute values they are using.

At a minimum, it would be great to be able to track these numbers. I wonder if it would be worth adding a “State of Iframes” report to HTTP Archive. Although with only this one metric it might be a bit overkill.

I pulled in iframe loading data while working on the Almanac.

Looks like just over 1% of sites use it on their home page. And ‘auto’ is the most popular value.