How to send request parameter from Express server to React application?

Question

I want to send these request headers to my react application:

app.get('/',function(req, res, next){

      req.user = req.headers["id"];
      next(null, req.user);

}) 

Answer 1

To send anything to client you need to put it in res , rather than req .

Do res.user = req.headers["id"]; instead of req.user = req.headers["id"];

Edit

next() is used to pass the response to next middleware function. If you want to send response back to client then you should use, res.send or res.json .

Like, res.json({"userid": XYZ})

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