Checking this site:

Those small images in the patch bounching horizontally. I would see the parameters, how much is the maximum left right limit in the bounce. I would see the Javascript which moves the images. I think this is not a css / @keyframes animation, but Javascript / jQuery does it. But I do not know how to identify the script which works the indicated html elements.

Selected rs-loop-wrap has no animation attribute. Nor its parent elements.

What is the right way to get the background logic which is responsable for the animation?

CodePudding user response：

this site is powered by the framework for wordpress
http://wordpress.framework-y.com/

This slider is used there
https://www.sliderrevolution.com/examples/

This is a pretty flexible slider with a lot of settings, so looking for this specific code would be a very thankless task. I looked at one of the pictures and saw that it moved from -15px to 15px. Perhaps others are slightly larger or smaller. You should follow them in the developer panel:
Dev Tools Screenshot
If you still want to look inside this slider, take a look at these files:
Dev Tools Network tab Screenshot
Have luck!