jquery实现带进度条的幻灯片
http://www.qdxw.net/xwhtml/276.html
how-do-i-add-jquery-progress-bar-to-slideshow-gallery
https://stackoverflow.com/questions/4947493/how-do-i-add-jquery-progress-bar-to-slideshow-gallery
https://www.cnblogs.com/xFeater/p/17000684.html
http://www.jqueryfuns.com/resource/2181
https://zhuanlan.zhihu.com/p/438940306
jQuery幻灯片插件Owl Carousel演示-进度条_dowebok
https://www.dowebok.com/demo/2014/93/index9.html
进度条
https://blog.csdn.net/qq_34285232/article/details/117447065
