获取Input标记内DropDownList的值

<input id="inputField" type="text">
<select id="dropdownList">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>
<button onclick="getValue()">获取值</button>

function getValue() {
  var inputField = document.getElementById("inputField");
  var dropdownList = document.getElementById("dropdownList");
  
  var inputValue = inputField.value;
  var dropdownValue = dropdownList.value;
  
  console.log("Input标记的值：" + inputValue);
  console.log("DropDownList的值：" + dropdownValue);
  
  // 可以在这里进行后续的业务逻辑处理
}