如何使用 CSS 自訂數字型別輸入上的增量箭頭？

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

<button class="btn btn-plus">
    <i class="fa fa-plus"></i>
</button>

<button class="btn btn-minus">
    <i class="fa fa-minus"></i>
</button>

.input-group {
    max-width: 9rem;
    padding: .5rem;
}

.input-group .form-control {
    text-align: right;
}

$('.btn-plus, .btn-minus').on('click', function(e) {
    const isNegative = $(e.target).closest('.btn-minus').is('.btn-minus');
    const input = $(e.target).closest('.input-group').find('input');
    if (input.is('input')) {
        input[0][isNegative ? 'stepDown' : 'stepUp']()
    }
})