如何限制输入文本框只允许0和1

<input type="number" min="0" max="1">

<input type="text" id="inputText">

<script>
  const inputText = document.getElementById('inputText');
  inputText.addEventListener('input', function(event) {
    const value = event.target.value;
    if (value !== '0' && value !== '1') {
      event.preventDefault();
      inputText.value = '';
    }
  });
</script>

<input type="text" id="inputText">

<script>
  const inputText = document.getElementById('inputText');
  inputText.addEventListener('input', function(event) {
    const value = event.target.value;
    const pattern = /^[01]*$/; // 正则表达式，只匹配0和1
    if (!pattern.test(value)) {
      inputText.value = '';
    }
  });
</script>