JSFiddle - React, Tailwind, and code Playground

HTML

<select name='dolshnost' size="1">
    <option></option>
    <option>Администратор</option>
    <option>Администратор центра</option>
</select>

JavaScript

$(document).ready(function(){
    var dol="Администратор";
    $("select[name='dolshnost'] :contains("+dol+")").attr("selected", "selected");
});