如何在HTML输入中添加零？

<input type="number" id="inputNumber" min="0" max="999" onblur="addLeadingZero(this)">
<script>
function addLeadingZero(input) {
  input.value = input.value.padStart(3, '0');
}
</script>

<input type="text" id="inputText" onblur="addLeadingZero(this)">
<script>
function addLeadingZero(input) {
  input.value = input.value.replace(/^(\d)$/, '0$1');
}
</script>