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Why do we need external.matchmedia.js for?
I'm working on the interactive website videos, and I realized I need the matchmedia.js file. I added to my mock website, but I'm wondering why do I need it for? I tried to read it, but I'm afraid I don't understand what it does. Also, is it something I could use in my personal website?
Thank you for the response! And thank you for the tutorials, I find them extremely helpful!