JSFiddle - React, Tailwind, and code Playground

HTML

<div>
	<div>
		<p>
			<span>
				<b>B1</b>
				<b>B2</b>
			</span>
		</p>
	</div>
</div>

<div id="status"></div>

JavaScript

var element = $("b").eq(1);

var path = "/" + element.parents().map(function () {
	return this.tagName;
}).get().reverse().join("/");

path += "/" + element.prop("tagName") + "[" + (element.prevAll().length + 1) + "]";

$("#status").text(path);