I’ll add some context here since you just posted a link
That’s using clamp(); as a responsive font re-sizer. I think @Bill uses this in his FAQ Pro bric?
The devs of Bootstrap also have a project called RFS
Looking forward to you showing us examples of you using this @KBConcepts 
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If I had the knowledge you have, I would definitely show you some examples. I mainly showed that to you experts. 
Yup, I’m using it in my new FAQ Pro bric & also in my next new bric coming soon. It’s a really nice feature that resizes text automatically - no more setting text sizes for each device size 
Bill
BricsDesign
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Brilliant! One day I hope to learn these thing, just for the fun of it.