Using Baidu map to query national subway lines

I've done a project recently , The project can facilitate the inquiry of subway lines nationwide , Simulated car arrival reminder on the subway line , Click the trolley to trigger related events , The use of api Baidu map query subway line , Subway Map api, combining vue-baidu-map

1. Judge whether the loading of metro route map is completed

 this.subway.addEventListener("subwayloaded", res => {
    
 	const lines = this.subway.getLines();
 })

2. Click the trolley to trigger related events
because landmarkPois For the initial [] , When the data is obtained later, it is inserted into the docking station data , and vue-baidu-map The road book in will be due to landmarkPois Triggered by the change of reload Method , Cause two cars to appear , So we still use the original road book

 // Fill in the road book information 
const lushu = new BMapLib.LuShu();
const length = Object.keys(lushu).length;
if (length) {
    
// Car id
  this.markId = lushu._marker.da;
}