JSFiddle - React, Tailwind, and code Playground

HTML

<div id='div1'></div>
<div id='div2'></div>
<button>Click</button>

CSS

div {
    display: inline-block;
    width: 100px;
    height: 100px;
}

#div1 {
    background: olive;
}

#div2 {
    background: teal;
}

JavaScript

$("button").click( function() {
    $("body").queue( function() {
        $("#div2").animate({
            width: 200
        });  
    });
    
    $("body").queue( function() {
        $("#div1").animate({
            width: 200
        });    
    });
    
    $("body").dequeue();
});