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input type="number" のマウスホイール操作を無効化する

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概要

Firefox や Google Chrome では、input type="number" フィールドの値をホイール操作で変更する事ができます。
入力ミスを防ぐ等の理由から、無効化したいケースがあると思います。
その場合の対処法メモです。

マウスホイールによる値の変更を無効化する例 (jQuery)

$(function(){
  $('form').on('focus', 'input[type=number]', function (e) {
    $(this).on('wheel.disableScroll', function (e) {
      e.preventDefault()
    })
  })
  $('form').on('blur', 'input[type=number]', function (e) {
    $(this).off('wheel.disableScroll')
  })
});

wheel イベント詳細はこちら
https://developer.mozilla.org/en-US/docs/Web/Events/wheel
IE9 以降のクロスブラウザに対応可。

スピンボタンも非表示にする例

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type=number] {
  -moz-appearance: textfield;
}
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