Promise.all结合async/await

https://blog.csdn.net/Creabine/article/details/87344158?depth_1-utm_source=distribute.pc_relevant_right.none-task-blog-BlogCommendFromBaidu-6&utm_source=distribute.pc_relevant_right.none-task-blog-BlogCommendFromBaidu-6

理解和使用Promise.all和Promise.race

https://www.jianshu.com/p/7e60fc1be1b2