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So, today I built `<calc-input>`. It’s a custom input element that accepts mathematical formulas — such as 2 + 3 or (2 + 3) * 4 — and automatically toggles between showing the formula on focus and the calculated result on blur. → brm.us/calc-input

I had to implement this at work a couple of years ago, it was actually quite fun to build That one also had a *totally unnecessary* small floating numpad showing up below the input field on focus just to highlight that it accepted formulas lol