基礎知識連接

https://blog.csdn.net/flyingpig2016/article/details/52895620  深刻理解JavaScript中的堆與棧 、淺拷貝與深拷貝

https://segmentfault.com/a/1190000017543088 bind函數做用

https://blog.csdn.net/wangchengiii/article/details/77926868 常見佈局