how to disable a select element in html code example

Example 1: disable text selection html

<div 
 style="-moz-user-select: none;
        -webkit-user-select: none;
        -ms-user-select:none;
        user-select:none;
        -o-user-select:none;"
     
 unselectable="on"
 onselectstart="return false;" 
 onmousedown="return false;">
    Blabla
</div>

Example 2: howt to disable a select tag using js

document.getElementById("one").onchange = function () {
  document.getElementById("two").setAttribute("disabled", "disabled");
  if (this.value == 'car')
    document.getElementById("two").removeAttribute("disabled");
};

Example 3: html select option disabled selected

<option selected disabled>Choose Tagging</option>