Sometimes, we want to set cookie in Node.js using the Express framework.

In this article, we’ll look at how to set cookie in Node.js using the Express framework.

How to set cookie in Node.js using the Express framework?

To set cookie in Node.js using the Express framework, we can use the res.cookie method.

For instance, we write

app.use(express.cookieParser());

app.use((req, res, next) => {
  const cookie = req.cookies.cookieName;
  if (!cookie) {
    const randomNumber = Math.random().toString();
    res.cookie('cookieName', randomNumber, {
      maxAge: 900000,
      httpOnly: true
    });
    console.log('cookie created successfully');
  } else {
    console.log('cookie exists', cookie);
  }
  next();
});

to call express.cookieParser to return the cookie parser middleware.

Then we call app.use to use it.

Then we call app.use again with a callback that checks if the cookie with key cookieName exists.

If it does, then we call res.cookie with the cookie key and value, and an object with the maxAge of the cookie in seconds to return the cookie with the response.

Then we call next so the next middleware can be called.

Conclusion

To set cookie in Node.js using the Express framework, we can use the res.cookie method.