HTML select dropdownlist how to display the VALUE/ID instead of text

Question

So this is the HTML code:

<select id='selUser' style='width: 200px;'>
  <option value='0'>Select User</option> 
  <option value='1'>Yogesh singh</option> 
  <option value='2'>Sonarika Bhadoria</option> 
  <option value='3'>Anil Singh</option> 
  <option value='4'>Vishal Sahu</option> 
  <option value='5'>Mayank Patidar</option> 
  <option value='6'>Vijay Mourya</option> 
  <option value='7'>Rakesh sahu</option> 
</select>

What I want to achieve is that, when I click on Value '1', the dropdownlist will display "1" instead of Yogesh Singh. Is it possible to do that?

Answer 1

This will display the value instead of the name when you select an option. I also wrote some code to put the name back if you change it again otherwise the number would just stay there added both examples:

var oldIndex = ''
var oldText = ''

function change(x) {
  if (oldIndex != '' && oldText != '') {
    x.options[oldIndex].innerHTML = oldText
  }
  oldIndex = x.value
  oldText = x.options[x.selectedIndex].innerHTML
  x.options[x.selectedIndex].innerHTML = x.value
}

function change2(x) {
  x.options[x.selectedIndex].innerHTML = x.value
}

<select onchange="change(this)" id='selUser' style='width: 200px;'>
  <option value='0'>Select User</option>
  <option value='1'>Yogesh singh</option>
  <option value='2'>Sonarika Bhadoria</option>
  <option value='3'>Anil Singh</option>
  <option value='4'>Vishal Sahu</option>
  <option value='5'>Mayank Patidar</option>
  <option value='6'>Vijay Mourya</option>
  <option value='7'>Rakesh sahu</option>
</select>

<select onchange="change2(this)" id='selUser2' style='width: 200px;'>
  <option value='0'>Select User</option>
  <option value='1'>Yogesh singh</option>
  <option value='2'>Sonarika Bhadoria</option>
  <option value='3'>Anil Singh</option>
  <option value='4'>Vishal Sahu</option>
  <option value='5'>Mayank Patidar</option>
  <option value='6'>Vijay Mourya</option>
  <option value='7'>Rakesh sahu</option>
</select>

Answer 2

Solution using jQuery:

var last_user_selected_name;

$(document).on('change', '#selUser', function() {
    $('#selUser option:not(:selected)').each(function() {
      if ($(this).text() === $(this).val()) {
        $(this).text(last_user_selected_name);
      }
    });

   var user_seleted = $('#selUser option:selected');

   if (user_seleted.val() != 0) {
       last_user_selected_name = user_seleted.text();
       user_seleted.text(user_seleted.val());
       console.log("User selected >> " + last_user_selected_name + 
                                " >> " + user_seleted.val());
   }
});

<script src='https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js'></script>
<select id='selUser' style='width: 200px;'>
  <option value='0'>Select User</option>
  <option value='1'>Yogesh singh</option>
  <option value='2'>Sonarika Bhadoria</option>
  <option value='3'>Anil Singh</option>
  <option value='4'>Vishal Sahu</option>
  <option value='5'>Mayank Patidar</option>
  <option value='6'>Vijay Mourya</option>
  <option value='7'>Rakesh sahu</option>
</select>

Answer 3

This script would do it:

document.body.onload = function(){
    sel = document.getElementById('selUser');
    opts = sel.childNodes;
    for(var i in opts){
        opts[i].innerHTML = opts[i].value;
    }
}