HTML：如何从下拉列表中删除“无”

Question

I have several drop-down lists in HTML, populated by data from an Excel sheet, which often, have empty cells/columns, so my drop-down lists become full of None (placeholder).

Ex.: Option 1
     ========
     Doctors
     Nurses
     None
     Month
     None

I cannot have these "None" removed in the backend, so I need a frontend solution. Any ideas?

My code:

<div class="center_charts_menu_1">
  <select name="select_label" id="select_label" class="custom-select select_label">
    <option value="['1']" id="0" selected disabled hidden>lengend</option>
    <option value="{{ column_a }}" id='{{ label_a }}'>{{ label_a }}</option>
    <option value="{{ column_b }}" id='{{ label_b }}'>{{ label_b }}</option>
    <option value="{{ column_c }}" id='{{ label_c }}'>{{ label_c }}</option>
    <option value="{{ column_d }}" id='{{ label_d }}'>{{ label_d }}</option>
  </select>
</div>

Answer 1

your options id seems to have the same names. So you can select all option-elements with the id="None" and remove it.

 document.querySelectorAll('select > #None').forEach(e => e.remove()); 

 <select name="select_label" id="select_label" class="custom-select select_label"> <option value="['1']" id="0" selected disabled hidden>lengend</option> <option value="{{ column_a }}" id='Doctors'>Doctors</option> <option value="{{ column_b }}" id='Nurses'>Nurses</option> <option value="{{ column_c }}" id='None'>None</option> <option value="{{ column_d }}" id='Month'>Month</option> <option value="{{ column_d }}" id='None'>None</option> </select>