JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://d3js.org/d3.v4.min.js"></script>
<h1>test</h1>
<div id="a"></div>
<div id="b"></div>

JavaScript

d3.queue()
   .defer(a,1)
   .await(b,2);

function a(x){
    d3.select('#a').text("a is executing with x="+x);
}
          
function b(x){
   d3.select('#b').text("b is executing with x="+x);
}