JSFiddle - React, Tailwind, and code Playground
HTML
<span>testing focus</span>
<div>
<fieldset>
<ul>
<li>
<label for="input_1">text label 1</label>
<input type="checkbox" id="input_1" role="form" />
</li>
<li>
<label for="input_2">text label 2</label>
<input type="checkbox" id="input_2" role="form" />
</li>
</ul>
</fieldset>
</div>
JavaScript
$("body").on("focusin", function(e) {
console.log(e);
});