<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=dev
问题 如题所示,源码如下: let scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop; 答案 关于document.body、document.documentElement、window.pageYoffset window.pageyoffset和document.body.scrollTo