这里的要点是将div的位置设置为鼠标作为附加效果，它应该有一个半径，但它不起作用：
2
637let inner_circle = document.getElementById("inner_circle");
window.addEventListener("mousemove", function(mouse) {
inner_circle.style.transform = `translate(${mouse.clientX}px, ${mouse.clientY}px)`; // sets the position of the inner circle to the mouse
});
#inner_circle{
margin-left: -3px;
margin-top: -3px;
position: fixed;
top: 0;
left: 0;
border: 1px solid #703be7;
border-radius: 50%; //<- doesn't work
font-size: 1px;
background-color: #703be7;
width: 6px;
width: 6px;
z-index: 1000001;
pointer-events: none;
}
<div id="inner_circle"></div>
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更改你的 CSS。宽度：6 像素；宽度：6 像素；宽度：6px；高度：6px；
let inner_circle = document.getElementById("inner_circle"); window.addEventListener("mousemove", function(mouse) { inner_circle.style.transform = `translate(${mouse.clientX}px, ${mouse.clientY}px)`; // sets the position of the inner circle to the mouse });#inner_circle{ margin-left: -3px; margin-top: -3px; position: fixed; top: 0; left: 0; border: 1px solid #703be7; border-radius: 50%; //我假设你指的是这里第二行的高度，这使得它成为一个问题
#inner_circle{ width: 6px; width: 6px; }所以只需将其更改为高度：
#inner_circle{ width: 6px; height: 6px; }