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js--小球跟隨滑鼠移動

技術標籤:javascript

<style>
	.box {
        width: 30px;
        height: 30px;
        border-radius: 50%;
        background-color: darkturquoise;
        display: none;
        position: fixed;
        left: 0;
        top: 0;
    }
</style>
<body>
	<div class='box'></box>
	<
script> var div = document.querySelector('div'); document.onmousemove = function (e) { div.style.display = 'block'; var radous = div.offsetWidth >> 1; e = e || window.event; var x = e.clientX; div.style.left = x - radous + 'px'; var y =
e.clientY; div.style.top = y - radous + 'px'; } </script> </body>