What does "CSSLayerBlockRule" in Chrome Console mean?

Issue

I am working on a typical "snake" game in js, and came across the following output on Chrome's console:

The prints from my script are working fine, but I cannot find any documentation on the last two lines. They do not seem like errors to me, but what are they?

Solution

It's an interface used internally by the browser that represents the JS side of CSS cascade layers which so far is only supported by Chrome, Firefox and Safari.

Read more about it in this blog post.

Running your code snippet in Chrome gives me this (expected) output:

Answered By - connexo