window.onload = () => {
document.getElementsByTagName("body")[0].style.height = document.body.scrollHeight+"px";
document.getElementsByTagName("body")[0].style.width = document.body.scrollWidth+"px";
}
window.onload = () => {
document.getElementsByTagName("body")[0].style.height = document.body.scrollHeight+"px";
document.getElementsByTagName("body")[0].style.width = document.body.scrollWidth+"px";
}
原文：https://www.cnblogs.com/duniang/p/8662971.html