在下拉列表中动态增加时间

<select id="timeSelect">
  <option value="">请选择时间</option>
</select>

// 获取下拉列表元素
var timeSelect = document.getElementById("timeSelect");

// 动态增加时间选项
var currentTime = new Date();
var hours = currentTime.getHours();
var minutes = currentTime.getMinutes();

for (var i = 0; i < 24; i++) {
  var option = document.createElement("option");
  option.value = i;
  option.text = (i < 10 ? "0" + i : i) + ":" + (minutes < 10 ? "0" + minutes : minutes);
  timeSelect.appendChild(option);
  minutes += 5; // 每隔5分钟增加一个选项
}