Image block to have loading=(eager|lazy) option

[crs1138]

Would it be possible to implement a new option for any block containing images (or at least for the image block itself) to control the lazy loading? I tried to do that using block's class and filter wp_img_tag_add_loading_attr but the class is attached to the <figure> wrapper and the filter works with the <img> element.

I'm running out of ideas apart implementing some sort of filter and adding an attribute to the core block. Is there another way? Why not to include this as a part of the block with the default value being lazy?

[t-hamano]

Hi @crs1138,

Sorry for the late reply.

If you want to change the image loading attribute in a particular block, how about using the render_block_{$blockname} filter hook? Since WordPress 6.2, you will be able to control the attribute more simply by using the WP_HTML_Tag_Processor class.

Would this approach help?