DOM和BOM中的宽高

主要看这几篇文章：
https://cloud.tencent.com/developer/article/1534759
https://www.cnblogs.com/kongxianghai/p/4192032.html
https://blog.csdn.net/xiebaochun/article/details/38382169

还可以参考：
https://blog.csdn.net/fanfan_h/article/details/90632127
https://www.cnblogs.com/lingdublog/p/6438055.html
https://www.cnblogs.com/bokebi520/p/4320733.html
https://blog.csdn.net/ynd_sg/article/details/79768730
https://blog.csdn.net/w390058785/article/details/80461845?utm_medium=distribute.pc_relevant.none-task-blog-searchFromBaidu-6.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-searchFromBaidu-6.nonecase
https://www.cnblogs.com/storebook/p/13298691.html#ylbtech
https://blog.csdn.net/lyx9611/article/details/89812571
https://blog.csdn.net/iiiliuyang/article/details/104345942
https://juejin.im/post/5ac08b405188257cc20d6d52
https://juejin.im/post/5ccea343518825405b56b7fd
https://developer.mozilla.org/zh-CN/docs/Web/API/HTMLElement/offsetTop