JSFiddle - React, Tailwind, and code Playground

HTML

<label>Account type</label><br />
<div>
    <label class="selected">
        <input type="radio" name="type" value="private" checked="checked" />
        Private
    </label>
    <label>
        <input type="radio" name="type" value="business" />
        Business
    </label>
</div>

<br/><br/>
<label for="username">Username</label>

JavaScript

var radioButtons = $("input[type=radio]");

radioButtons.change(radioButtons, function (event)
{
    var target = $(event.target);
    var label = $("label[for=username]");

    target.val() == "private" ? label.text("Username") : label.text("Company name");
});