はてなブックマーク - HTML <input type="number"> 属性値 - HTML | MDN
https://b.hatena.ne.jp/entry/s/developer.mozilla.org/ja/docs/Web/HTML/Reference/Elements/input/number
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https://b.hatena.ne.jp/hujuu/20230313#bookmark-4692799428131206274
“type="number"”2023-03-13T11:26:04Zkathew
https://b.hatena.ne.jp/kathew/20191224#bookmark-4679101947119609762
2019-12-24T09:05:53Zformhtmlwebreference