<select id="options">
  <option value="data1">Option 1</option>
  <option value="data2">Option 2</option>
  <option value="data3">Option 3</option>
</select>

var options = document.getElementById("options");
var selectedValue = options.value;

// 根据选项的值选择相应的JSON数据
if (selectedValue === "data1") {
  var jsonData = {
    name: "Data 1",
    value: 10
  };
} else if (selectedValue === "data2") {
  var jsonData = {
    name: "Data 2",
    value: 20
  };
} else if (selectedValue === "data3") {
  var jsonData = {
    name: "Data 3",
    value: 30
  };
}

// 使用选择的JSON数据进行后续操作
console.log(jsonData);