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How to send flash messages in Node Express 4.0?

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To send flash messages in Node Express 4.0, we use the flash package.

To add it, we write

app.use(flash());

Then we send a flash message in our middleware with

req.flash("signupMessage", anyValue);

The first argument is the key and the 2nd is the value.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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