Background: When making applets, there is a shop interface that calls on almost every page, so take it out and put it in App.js lower
But in the process, take notes to save a complete picture.
1. Because only in App.js Down, the show interface is adjusted.
On other subpages, global variables stored in the shop are used, so if this interface is not invoked successfully or asynchronously not synchronized quickly at this time, it will...