JSFiddle - React, Tailwind, and code Playground
HTML
<label><input type="checkbox" />JavaScript</label><br />
<label><input type="checkbox" />Perl</label><br />
<input name="result" />
JavaScript
$(function() {
$('input').on('click', function() {
var values = [];
$('input:checked').each(function() {
values.push($(this).parent().text());
});
$('[name="result"]').attr({value: values.join(', ')});
});
});