在javascript中从用户获取变量的名称

var variableName = prompt("请输入变量的名称");
console.log(variableName);

<form>
  <label for="variableName">请输入变量的名称:</label>
  <input type="text" id="variableName" name="variableName">
  <button onclick="getVariableName()">提交</button>
</form>

<script>
function getVariableName() {
  var variableName = document.getElementById("variableName").value;
  console.log(variableName);
}
</script>

var variableName = process.argv[2];
console.log(variableName);