js清除file选择的文件

<input type="file" id="fileInput">
<button onclick="clearFileInput()">清除文件</button>

<script>
function clearFileInput() {
  document.getElementById('fileInput').value = '';
}
</script>

<div id="fileInputContainer">
  <input type="file" id="fileInput">
</div>
<button onclick="clearFileInput()">清除文件</button>

<script>
function clearFileInput() {
  const container = document.getElementById('fileInputContainer');
  const oldInput = document.getElementById('fileInput');
  const newInput = document.createElement('input');
  newInput.type = 'file';
  newInput.id = 'fileInput';
  container.replaceChild(newInput, oldInput);
}
</script>