JSFiddle - React, Tailwind, and code Playground

HTML

<div class="Container">
    <div class="Content"></div>
</div>
<br />
<input id="showScrollLeft" type="button" value="Show ScrollLeft" />

CSS

body { direction: rtl; }
div.Container { border: 5px solid #F00; width: 500px; height: 400px; overflow: auto; }    
div.Content { background-color: #00F; width: 900px; height: 380px; }

JavaScript

$(document).ready(function()
{
    $("#showScrollLeft").click(function(e)
    {
        alert($("div.Container").scrollLeft());
    });
});