JSFiddle - React, Tailwind, and code Playground
HTML
<form>
<input type="checkbox" name="bla[]" value="1" />
<input type="checkbox" name="bla[]" value="2" />
</form>
JavaScript
$(document).ready( function () {
$("input[name=bla]").each( function () {
alert($(this).val());
});
});