如何使用onchange函数显示多个输入域？

<input type="text" id="inputText">
<select id="selectList">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
</select>

document.getElementById("inputText").onchange = function() {
  var inputValue = this.value;
  document.getElementById("output").innerHTML = "输入的值是：" + inputValue;
}

document.getElementById("selectList").onchange = function() {
  var selectedValue = this.value;
  document.getElementById("output").innerHTML = "选择的值是：" + selectedValue;
}

<div id="output"></div>