JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div class="class">Div 1</div>
    <div class="class">Div 2</div>
    <div id="id">Div 3</div>
</body>

CSS

.class {
    border:1px solid black;
    margin: 10px 0 10px 0;
}
#id {
    border:1px solid blue;
    margin: 10px 0 10px 0;
}

JavaScript

var someText = $("<span>").html("- Appended Text");

$(".class").append(someText);
$("#id").append(someText);