如何在JavaScript下拉菜单中查询数值？

// HTML
<select id="mySelect">
  <option value="1">数值1</option>
  <option value="2">数值2</option>
  <option value="3">数值3</option>
</select>
<button onclick="queryValue()">查询</button>
<p id="result"></p>

// JavaScript
function queryValue() {
  var selectElement = document.getElementById("mySelect");
  var selectedValue = selectElement.value;

  var resultElement = document.getElementById("result");
  var result;

  // 查询逻辑
  if (selectedValue === "1") {
    result = "数值1的查询结果";
  } else if (selectedValue === "2") {
    result = "数值2的查询结果";
  } else if (selectedValue === "3") {
    result = "数值3的查询结果";
  } else {
    result = "无效的数值";
  }

  resultElement.innerHTML = result;
}