javascript - How to render flash message in Node.JS?

Question

I am trying to display flash message without render, just redirect. It can possible if it is how ?

const session = require('express-session');
const bodyParser = require('body-parser')
const urlencoded = bodyParser.urlencoded({extended:false})
const cookieParser = require('cookie-parser');

const flash = require('connect-flash');
app.use(cookieParser('secret'));
app.use(session({
  secret: 'keyboardSecrIncKey',
  resave: false,
  saveUninitialized: true,
  cookie: { secure: true, maxAge: 60000 }
}))

app.use(flash());

app.use('/test',urlencoded,(req,res,next)=>{
  if(req.body.name == ''){
    req.flash('info', 'Please Enter Your Name.');
    res.locals.message = req.flash();
    console.log(res.locals)
    res.redirect('back')
  }
  else{
    next()
  }
});

I am using handlebars view engine. And this is my test.handlebars file:

{{#if messages}}
 It is working
{{/if}}

But it won't display any text. If i use res.render('test', {...}) it is working. But while i click refresh button browser send me alert(confirm the re-form submission etc.)

question from:https://stackoverflow.com/questions/65600160/how-to-render-flash-message-in-node-js

Answer 1

When you redirect, you tell your user's browser to display some other page. It is in that page that you would display your flash message, not in the page using req.flash() to create a flash message.