JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <span>1</span>
    <span>2</span>
</div>
<div>
    <span>3</span>
    <span>4</span>
</div>

JavaScript

var div = d3.selectAll("div")
    .each(function() { console.log("a div"); });

var span = div.selectAll("span")
    .each(function() { console.log("a span"); });