JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <img src="Images/image.jpg"/>
    </div>

CSS

#container
    {
        position:absolute;
        left:400px;
        top:200px;
    }

JavaScript

$(document).ready( function() {
    $("#container").mouseleave(function() {
        if ($(this).css("left")=="400px") {
            alert("Left = 400px");
        }
    });
});