Better number input

by Optimix

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="quantity">
  <input type="number" min="1" max="9" step="1" value="1">
</div>

CSS

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  min-width: 100vw;
  background: #34495E;
  font-size: 1rem;
}

.quantity {
  position: relative;
}

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;
}

.quantity input {
  width: 45px;
  height: 42px;
  line-height: 1.65;
  float: left;
  display: block;
  padding: 0;
  margin: 0;
  padding-left: 20px;
  border: none;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
  font-size: 1rem;
  border-radius: 4px;
}

.quantity input:focus {
  outline: 0;
}

.quantity-nav {
  float: left;
  position: relative;
  height: 42px;
}

.quantity-button {
  position: relative;
  cursor: pointer;
  border: none;
  border-left: 1px solid rgba(0, 0, 0, 0.08);
  width: 21px;
  text-align: center;
  color: #333;
  font-size: 13px;
  font-family: "FontAwesome" !important;
  line-height: 1.5;
  padding: 0;
  background: #FAFAFA;
  -webkit-transform: translateX(-100%);
  transform: translateX(-100%);
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
}

.quantity-button:active {
  background: #EAEAEA;
}

.quantity-button.quantity-up {
  position: absolute;
  height: 50%;
  top: 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  font-family: "FontAwesome";
  border-radius: 0 4px 0 0;
  line-height: 1.6
}

.quantity-button.quantity-down {
  position: absolute;
  bottom: 0;
  height: 50%;
  font-family: "FontAwesome";
  border-radius: 0 0 4px 0;
}

JavaScript

$(document).ready(function () {
  jQuery('<div class="quantity-nav"><button class="quantity-button quantity-up">&#xf106;</button><button class="quantity-button quantity-down">&#xf107</button></div>').insertAfter('.quantity input');
  jQuery('.quantity').each(function () {
    var spinner = jQuery(this),
        input = spinner.find('input[type="number"]'),
        btnUp = spinner.find('.quantity-up'),
        btnDown = spinner.find('.quantity-down'),
        min = input.attr('min'),
        max = input.attr('max');

    btnUp.click(function () {
      var oldValue = parseFloat(input.val());
      if (oldValue >= max) {
        var newVal = oldValue;
      } else {
        var newVal = oldValue + 1;
      }
      spinner.find("input").val(newVal);
      spinner.find("input").trigger("change");
    });

    btnDown.click(function () {
      var oldValue = parseFloat(input.val());
      if (oldValue <= min) {
        var newVal = oldValue;
      } else {
        var newVal = oldValue - 1;
      }
      spinner.find("input").val(newVal);
      spinner.find("input").trigger("change");
    });

  });
});