Wordpress already uses srcset now. What I missed out was a simple way to handle and customize the sizes attribute—in my opion what makes srcset so eff …

Samuel Brynolf

Enables shortcode and a template tag to pull srcset-images by attachment-ID. This is way to complement WordPress built in srcset which (of course) focus on the_content images and media-sizes set in settings. Sometimes your layout demands more, or you are using other ways to put images on your site not using the_thumbnail or the_content. For example, I use Advanced Custom Fields a lot pulling images by ID.
Generated markup are built from a set of custom image-sizes and the, by you configured, (srcset-)sizes attribute. Use the settings-page for default values and override them any time in the shortcode or template tag.
<ul>
<li>Option: Generate shortcodes by the mediauploader-button. </li>
<li>Option: Enable simple lightbox functionality. </li>
<li>Option: Enable lazhyloading. Option: Include Picturefill</li>
</ul>
Full documentation at <a href="https://samuelbrynolf.se/2016/04/wordpress-plugin-make-it-srcset/" title="Wordpress plugin: Make it Srcset" rel="nofollow ugc">WordPress plugin: Make it Srcset</a>

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