express js cannot set res.json before res.redirect

hello im using express module in node JS

res.json({ auth: true, token: token, message: "success" });
res.redirect('/');

i have to send some json data first then redirect ..but i’m getting this error:

node:_http_outgoing:576

throw new ERR_HTTP_HEADERS_SENT(‘set’);
^

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
can anyone please help, thank you

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Answers:

Method 1

Answers:

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Method 1

you can include “redirect” as a property within json, for instance :

res.json({ auth: true, token: token, message: "success", redirect : "/whatever/go"});

then, on the client side you can perform the redirecting like this :

fetch(url)
      .then(res => res.json())
      .then(body => window.location.href = body.redirect)
      .catch(err => console.log(err));

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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