Skeleton Screen on page load

I understand there is a skeleton screen pattern that displays a page outline when the page loads. What is the name of the pattern and where do I find more info on it?

Are you asking for web or mobile? Are you looking for a splash screen?


Skeleton screen idea here:

My understanding is that the skeleton screen for Outsystems is based on an image. This example below is in CSS. So to expand on the question - can I implement it in CSS instead of an image

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