获取浏览器高度

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var windowHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
console.log("浏览器窗口高度：" + windowHeight + " 像素");

获取屏幕高度

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var screenHeight = window.screen.height;
console.log("屏幕高度：" + screenHeight + " 像素");

获取页面滚动的高度

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var scrollHeight = window.scrollY || document.documentElement.scrollTop;
console.log("页面滚动高度：" + scrollHeight + " 像素");

获取鼠标所在位置

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document.addEventListener("mousemove", function(event) {
    var mouseX = event.clientX;
    var mouseY = event.clientY;
    console.log("鼠标位置：X=" + mouseX + ", Y=" + mouseY);
});