JSFiddle - React, Tailwind, and code Playground
HTML
<input type="radio" name="type" value="customurl"
onclick="document.getElementById('text').removeAttribute('disabled')">wanna custom url?
<input type="text" id="text" name="custom"
placeholder="should be 5 charecters at least" disabled>
<br><br>
<input type="radio" name="type" value="customurl"
onclick="document.getElementById('sel').removeAttribute('disabled')">random?
<select id="sel" name="charstype" disabled>
<option>Letters</option>
<option>Number</option>
</select>