JSFiddle - React, Tailwind, and code Playground
HTML
<input type="radio" name="weight_id" value="500g" checked>
<input type="radio" name="weight_id" value="1k">
<input type="radio" name="weight_id" value="2k">
<div id="weight_id">500g</div>
JavaScript
$('input[name="weight_id"]').click(function() {
$('#weight_id').text(this.value);
});