scrollIntoView将指定元素定位到浏览器顶部，底部，中间

var element = document.getElementById("box");
 
element.scrollIntoView();//顶部
element.scrollIntoView(false);//底部
element.scrollIntoView({block: "end"});
element.scrollIntoView({behavior: "instant", block: "end", inline: "nearest"});