res.append('Access-Control-Allow-Origin',"*");
res.append('Access-Control-Allow-Content-Type',"*");
将其放到 api 路由中间件中:
api.use(rucntion(req,res,next){
res.append('Access-Control-Allow-Origin',"*");
res.append('Access-Control-Allow-Content-Type',"*");
next();
})
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