如何不清除输入字段onClick

<input type="text" id="inputField" value="默认值">
<button onClick="preserveInput()">保留输入</button>

<script>
function preserveInput() {
  var input = document.getElementById("inputField");
  var preservedValue = input.value;
  // 执行其他操作...
  input.value = preservedValue;
}
</script>

<form onsubmit="preserveInput()">
  <input type="text" id="inputField" value="默认值">
  <button type="submit">提交</button>
</form>

<script>
function preserveInput() {
  var input = document.getElementById("inputField");
  var preservedValue = input.value;
  // 执行其他操作...
  input.value = preservedValue;
}
</script>