JSFiddle - React, Tailwind, and code Playground

by Karmik Patel

HTML

<div class="spin"><span>&ndash;</span><input value="0" /><span>+</span></div>

CSS

.spin {
    display: inline-block;
}
.spin span {
    display: inline-block;
    width: 20px;
    height: 22px;
    text-align: center;
    padding-top: 2px;
    background: #ff0;
    border: 1px solid #aaa;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    -webkit-user-select: none;
    -webkit-user-modify: read-only !important;
}
.spin span:first-child {
    border-radius: 4px 0 0 4px;
}
.spin input {
    width: 40px;
    height: 20px;
    text-align: center;
    font-weight: bold;
}

JavaScript

var spins = document.getElementsByClassName("spin");
for (var i = 0, len = spins.length; i < len; i++) {
    var spin = spins[i],
        span = spin.getElementsByTagName("span"),
        input = spin.getElementsByTagName("input")[0];
    
    input.onchange = function() { input.value = +input.value || 0; };
    span[0].onclick = function() { input.value = Math.max(0, input.value - 1); };
    span[1].onclick = function() { input.value -= -1; };
}