Image sizes different screens

[colomet]

• [X] I've read and understood the contribution guidelines.
• [X] I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened.

The same image each situation

Please describe what you expected to happen and why.

one different image each screen

Describe the solution you'd like

<img src="IMAGE_URL" srcset="MEDIUM_IMAGE_URL 300w, LARGE_IMAGE_URL 1024w" sizes="(max-width: 1024px) 100vw, 1024px" />

Screenshots

Additional context

https://www.mywpexpert.com/wordpress-responsive-images/

Technical info

• Books4Languages Child Theme for PressBooks: [1]
• WordPress version: [ 3.9.8]
• PressBooks version: [5.5]
• Relevant plugins in case of a bug:

[colomet]

[colomet]

feature image, if should be 768, the original one must have 3.000 or so, in that way we have good quality in print paper... a warming or something is necesary by publishing