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javascriptnode.jsexpress

How to use flash in Nodejs express

I want to use the flash notification to show a successful message. I tried it as I mention below. When I tried the below code it doesn't show anything. How can I solve this?

page.js :

exports.create = async (req, res) => {
  try {
     req.flash('error_messages_test', 'Invalid credentials');
     res.redirect('/page');
  } catch (e) {
     //code...
  }
};

page.handlerbars :

<div>
  {{#if error_messages_test}}
    <div class="alert alert-danger">{{error_messages_test}}</div>
  {{/if}}
</div>

app.js :

const flash = require('connect-flash');
app.use(flash());
Solution

  • You need to pass the "error_messages_test" variable to your view from the function that handles your "/page" route.

    Try like this:

    app.get('/page', function(req, res){
  // other stuff
  // Get flash messages by passing the key to req.flash()
  res.render('page', { error_messages_test: req.flash('error_messages_test') });
});