JSFiddle - React, Tailwind, and code Playground

by kyleshen

HTML

<select id="sel"  multiple="true">
    <option value="A">AAAAAAAA</option>
    <option value="B">BBBBBBBB</option>
    <option value="C">CCCCCCCC</option>
</select>
<Br/>
<input type="button" value="Highlight Option B" id="btn_option">

JavaScript

$('#btn_option').click(function(){
    $('#sel option').each(function(i){
        if($(this).val() =="B"){
            $('#sel option').eq(i).css("color","red");
        }        
    });
});