Flash message middleware for Express sessions
npm install session-flashThe flash is a special area of the session used for storing messages. Messages
are written to the flash and cleared after being displayed to the user. The
flash is typically used in combination with redirects, ensuring that the message
is available to the next page that is to be rendered.
npm i session-flash
#### Express 5.x
Flash messages are stored in the session. First, setup sessions as usual by
enabling cookieParser and session middleware. Then, use flash middleware
provided by session-flash.
``javascript
const app = express();
const cookieParser = require('cookie-parser');
const session = require('express-session');
const flash = require('session-flash');
app.use(cookieParser());
app.use(session({
secret: 'session-secret',
resave: false,
saveUninitialized: false,
cookie: { maxAge: 60000 }
}));
app.use(flash());
`
With the flash middleware in place, all requests will have a req.flash() function
that can be used for flash messages.
`javascript
app.get('/flash', function(req, res){
// Set a flash message by passing the key, followed by the value, to req.flash().
req.flash('info', 'Flash is back!')
res.redirect('/');
});
app.get('/', function(req, res){
// Get an array of flash messages by passing the key to req.flash()
res.render('index', { messages: req.flash('info') });
});
``
[The MIT License]
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