JSFiddle - React, Tailwind, and code Playground

HTML

<select id="liste">
    <option value ="-1" class="non" selected disabled>SĂ©lectionner un type d'intervention</option>
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
</select>

<button id="test">Test</button>

JavaScript

$(function() {
 
    $('#test').click(function() {
        if($('#liste :selected').hasClass('non'))
            alert($('#liste :selected').attr('disabled'));
        else
            alert($('#liste :selected').attr('disabled'));
    });
    
});