How can I disable an <option> in a <select> based on its value in JavaScript?

Set an id to the option then use getElementById and disable it when x value has been selected, like so:

<body>
      <select class="pull-right text-muted small" 
                 name="driveCapacity" id=driveCapacity onchange="checkRPM()">
      <option value="4000.0" id="4000">4TB</option>
      <option value="900.0" id="900">900GB</option>
      <option value="300.0" id ="300">300GB</option>
    </select>
    </body>
<script>
var perfType = document.getElementById("driveRPM").value;
if(perfType == "7200"){         
        document.getElementById("driveCapacity").value = "4000.0";
        document.getElementById("4000").disabled = false;           
    }else{          
        document.getElementById("4000").disabled = true;            
    }    
</script>

Here with JQuery, if anybody search it:

var vals = new Array( 2, 3, 5, 8 );
select_disable_options('add_reklamaciq_reason',vals);
select_disable_options('add_reklamaciq_reason');

function select_disable_options(selectid,vals){
  var selected = false ;
  $('#'+selectid+' option').removeAttr('selected');
  $('#'+selectid+' option').each(function(i,elem){
       var elid = parseInt($(elem).attr('value'));
       if(vals){
           if(vals.indexOf(elid) != -1){
               $(elem).removeAttr('disabled');
               if(selected == false){
                   $(elem).attr('selected','selected');
                   selected = true ; 
               }
           }else{
               $(elem).attr('disabled','disabled'); 
           }
       }else{
            $(elem).removeAttr('disabled');
       }
  });   
}

For some reason other answers are unnecessarily complex, it's easy to do it in one line in pure JavaScript:

Array.prototype.find.call(selectElement.options, o => o.value === optionValue).disabled = true;

or

selectElement.querySelector('option[value="'+optionValue.replace(/["\\]/g, '\\$&')+'"]').disabled = true;

The performance depends on the number of the options (the more the options, the slower the first one) and whether you can omit the escaping (the replace call) from the second one. Also the first one uses Array.find and arrow functions that are not available in IE11.


JavaScript, in 2022

You can use querySelectorAll, and forEach off of the resulting NodeList to do this same thing more easily in 2022.

document.querySelectorAll("#foo option").forEach(opt => {
    if (opt.value == "StackOverflow") {
        opt.disabled = true;
    }
});

Do be mindful of string-comparisons, however. 'StackOverflow' and 'stackoverflow' are not the same string. As such, you can call .toLowerCase() on strings before comparing, or even go with a case-insensitive regular expression comparison like the this:

if ( /^stackoverflow$/i.test(option.value) ) {
  option.disabled = true;
}

Pure Javascript (2010)

With pure Javascript, you'd have to cycle through each option, and check the value of it individually.

// Get all options within <select id='foo'>...</select>
var op = document.getElementById("foo").getElementsByTagName("option");
for (var i = 0; i < op.length; i++) {
  // lowercase comparison for case-insensitivity
  (op[i].value.toLowerCase() == "stackoverflow") 
    ? op[i].disabled = true 
    : op[i].disabled = false ;
}

Without enabling non-targeted elements:

// Get all options within <select id='foo'>...</select>
var op = document.getElementById("foo").getElementsByTagName("option");
for (var i = 0; i < op.length; i++) {
  // lowercase comparison for case-insensitivity
  if (op[i].value.toLowerCase() == "stackoverflow") {
    op[i].disabled = true;
  }
}

###jQuery

With jQuery you can do this with a single line:

$("option[value='stackoverflow']")
  .attr("disabled", "disabled")
  .siblings().removeAttr("disabled");

Without enabling non-targeted elements:

$("option[value='stackoverflow']").attr("disabled", "disabled");

​ Note that this is not case insensitive. "StackOverflow" will not equal "stackoverflow". To get a case-insensitive match, you'd have to cycle through each, converting the value to a lower case, and then check against that:

$("option").each(function(){
  if ($(this).val().toLowerCase() == "stackoverflow") {
    $(this).attr("disabled", "disabled").siblings().removeAttr("disabled");
  }
});

Without enabling non-targeted elements:

$("option").each(function(){
  if ($(this).val().toLowerCase() == "stackoverflow") {
    $(this).attr("disabled", "disabled");
  }
});

Tags:

Javascript

Html

Select

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