"Simple number input spinner counter"
Bootstrap 4.1.1 Snippet by bbbenji

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<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
<h5 class="d-flex justify-content-between align-items-center">
<span>Your cart</span>
<span class="badge badge-primary badge-pill counter">1</span>
</h5>
<div class="input-group spinner">
<div class="input-group-prepend">
<button class="btn text-monospace minus" type="button">-</button>
</div>
<input type="number" class="count form-control" min="0" max="10" step="1" value="1">
<div class="input-group-append">
<button class="btn text-monospace plus" type="button">+</button>
</div>
</div>
</div>
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.container {
max-width: 200px;
margin: 2rem auto;
}
.spinner * {
text-align: center;
}
.spinner input::-webkit-outer-spin-button,
.spinner input::-webkit-inner-spin-button {
margin: 0;
-webkit-appearance: none;
}
.spinner input:disabled {
background-color: white;
}
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$(document).ready(function() {
min = 0; // Minimum of 0
max = 10; // Maximum of 10
$('.count').prop('disabled', true);
$(".minus").on("click", function() {
if ($('.count').val() > min) {
$('.count').val(parseInt($('.count').val()) - 1 );
$('.counter').text(parseInt($('.counter').text()) - 1 );
}
});
$(".plus").on("click", function() {
if ($('.count').val() < max) {
$('.count').val(parseInt($('.count').val()) + 1 );
$('.counter').text(parseInt($('.counter').text()) + 1 );
}
});
});
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