constexpress=require("express") constapp=express() app.all('',(req,res,next)=>{ res.header('Access-Control-Allow-Origin',"") res.header('Access-Control-Allow-Methods',"POST,GET") next(); }) app.get('/getdata',(req,res)=>{ res.json({ name:"geyao", age:18 }) }) app.listen(3003,()=>{ cons...