zoom.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

    <style>
        #container {
            text-align: center;
            width: 500px;
            height: 312px;
            background-color: #707070;
            ;
            box-shadow: 3px 3px 10px #000;
            overflow: hidden;
        }
    </style>
    <h1>Imagem zoom</h1>
    <div id="container">

        <img src="https://getwallpapers.com/wallpaper/full/e/1/2/41252.jpg" style="width:100%">
    </div>

    <script>
        const container = document.getElementById('container')
        const img = document.querySelector('img')

        container.addEventListener('mousemove', (e) => {
            const x = e.clientX - e.target.offsetLeft
            const y = e.clientY - e.target.offsetTop

            console.log(x, y)
            img.style.transformOrigin = `${x}px ${y}px`
            img.style.transform = 'scale(2)'

        })

        container.addEventListener('mouseleave', (e) => {
            img.style.transform = " scale(1)"
        })
    </script>
</body>

</html>