<input type="number" name="number" pattern="[0-9]*">
$("input[type='number']").number();
<input type="number" name="number" pattern="[0-9]*" disabled>
$("input[type='number']").number();
<input type="number" name="number" pattern="[0-9]*" min="0" max="20" step="2">
$("input[type='number']").number();
<input type="number" name="number" pattern="[0-9]*">
$("input[type='number']").number({
theme: ""
});