Depending on the browser’s favicon parsing, you can do some odd things with it by adding a new <icon> element. I was looking at this the other day and was able

Depending on the browser’s favicon parsing, you can do some odd things with it by adding a new <icon> element. I was looking at this the other day and was able to get a basic example of blinking it together (the “What about the favicon?” section from https://alexanderell.is/posts/attention-javascript/ https://alexanderell.is/posts/attention-javascript/).