How does Wix implement the webp extension for an image?

Question

JPEG

Question on topic. And how can this be done manually on a custom site?
Example
Thank you.

Answer 1

I answer the question myself.
This is what the Google PageSpeed ​​module does.

Answer 2

For browsers that do not support webp, use the picture tag, which, depending on the support, will display the image in the desired format