在下拉select中填充之后，将JS for循环放入Jinja模板化HTML中以供用户选择

<select id="mySelect">
  {% for option in options %}
    <option value="{{ option }}">{{ option }}</option>
  {% endfor %}
</select>

var options = ['Option 1', 'Option 2', 'Option 3']; // 替换为实际的选项值数组

var select = document.getElementById('mySelect');

for (var i = 0; i < options.length; i++) {
  var option = document.createElement('option');
  option.value = options[i];
  option.text = options[i];
  select.appendChild(option);
}

<script>
  var options = {{ options|tojson }};
  
  var select = document.getElementById('mySelect');

  for (var i = 0; i < options.length; i++) {
    var option = document.createElement('option');
    option.value = options[i];
    option.text = options[i];
    select.appendChild(option);
  }
</script>