disable bootstrap select option using javascript

Question

I attempt to disable my specific bootstrap select option using javascript.

I know how to disable "normal select option", but when using bootstrap select it just didnt works (its disabled/greyed but i can still choose it) here jsfidle

<select name="dropdownBranch" id="dropdownBranch" class="selectpicker" data-live-search="true">
  <option value="0">Choose Number</option>
    <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
</select>
<select id="pureDropDown">
  <option value="0">Choose Number</option>
    <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
</select>
<button onclick="disableDropdown()">disable</button>



function disableDropdown(){
var selectobject;
selectobject=document.getElementById("dropdownBranch").getElementsByTagName("option");
    selectobject[3].disabled=true;

selectobject=document.getElementById("pureDropDown").getElementsByTagName("option");
    for(z=0;z<selectobject.length;z++){
        selectobject[z].disabled=true;
        }

}

i try to remove specific option too and the same case happen (work on normal dropdown but not work on bootstrap select)

Answer 1

As described here, you need to re-render the select picker after changing the disabled property of an option.

This should do the trick: (JSFiddle)

function disableDropdown(){
    var selectobject;
    selectobject = document.getElementById("dropdownBranch").getElementsByTagName("option");
    selectobject[3].disabled = true;
    $('#dropdownBranch').selectpicker('render');
}

Answer 2