jheapsandClaude Opus 5
295d9eff4a
A focused <input type="number"> is a spinbutton, and a browser lets the mouse wheel drive it. Measured on the running page at 1280x900 with the sidebar open: focus the small blind and scroll, $5 becomes $5.50. Focus a seat's stack and scroll, $500 becomes $501. Both go straight through to localStorage, because these fields save on `input` like everything else here. Nothing is announced and nothing looks wrong. The tool has invented a chip, on a table whose whole purpose is that the chip count is right, and the gesture that did it was a dealer reaching for another panel. The rule is narrow on purpose. Every other way of driving a spinbutton is deliberate -- the arrow keys, the stepper arrows, typing -- so scrolling is the only one taken away. Verified after: the value holds, one ArrowUp still moves it, typing still works, and the page still scrolls. Blur rather than preventDefault. Cancelling the event stops the value moving and stops the page moving with it, which trades a silent bug for a sidebar that mysteriously will not scroll -- a problem the dealer can see and cannot explain, instead of one they cannot see at all. The decision lives in Money as a predicate beside selectsOnFocus, so the rule is testable without a browser and main.js only does the blurring. Two things checked rather than assumed. The tagName guard in the predicate is decoration: deleting it passes every test, because nothing but an <input> carries type="number". That is now said in the comment instead of being left to look load-bearing. And the page's one <select> -- which way the blinds move -- is not vulnerable: focused, hovered and scrolled 300px in Chromium it stays where it was, so it is left out of the rule rather than defended against. 916 tests pass, 6 of them new. Four fault injections into the predicate are caught; a fifth was applied, not caught, and turned out not to be a fault. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_015bnp7xKUPFFSpwkYNFaPgb