JSFiddle - React, Tailwind, and code Playground
by ablealias
HTML
<div class="large-4 columns">
<label for="checkbox"><input type="checkbox" id="checkbox">co-applicant</label>
<div class="large-12 columns">
<input type="text" class="inputbox" required pattern="[a-zA-Z]+" placeholder="First name" disabled="disabled">
</div>
<div class="large-12 columns">
<input type="text" class="inputbox" required pattern="[a-zA-Z]+" placeholder="Last name" disabled="disabled">
</div>
<div class="large-12 columns">
<input type="email" class="inputbox" required placeholder="Email" disabled="disabled">
</div>
</div>
JavaScript
$('#checkbox').click(function() {
$(".inputbox").prop("disabled",false);
});