<picture>
elements with <source>
and <img>
children with srcset
attributes.<img>
elements with src
and srcset
attributes.<img>
elements with a single src
attribute defined on page load.data-src
or any other attribute names that your website uses for this purpose).<img>
elements that are not descendants of an <a>
tag (anchor element). Tests can only be initiated on <img>
elements that are descendants of an anchor tag linking to the target article.<picture>
tags that do not properly have an <img>
element as a child.background-image
CSS property.<img>
elements that have their src
attributes dynamically altered by JavaScript.<img>
element at mobile and desktop breakpoints: if the srcs
differ at each breakpoint, JavaScript is dynamically altering the src
.<picture>
or <img>
elements that are injected dynamically into the page by JavaScript dependent on user action.