express-session-helpers
A set of utilities to help out with express sessions.
Installation
yarn add express express-session express-session-helpers
Reference
Session Flashing
Flash a key / value pair to the session that only lives for the next request.
Usage:
const express = require('express');
const app = express();
const session = require('express-session');
const { flash } = require('express-sesssion-helpers');
app.use(session({
secret: 'lol'
}));
// This needs to be AFTER app.use(session())
app.use(flash());
app.post('/login', function(req, res, next) {
// Let's say you're logging in a user and you did validation
// on their credentials. They didn't input their email / password
// ...
req.flash('errors', [
'Email is required',
'Password is required',
]);
res.redirect('/login');
});
// app.get('/login') etc...Then magically in your view, you have access to a flash variable.
<!-- template engine is nunjucks -->
{% if flash.errors %}
{% for error in flash.errors %}
<li>{{ error }}</li>
{% endfor %}
{% endif %}Sending back old input
Send back the users input to be used in the form for the next request only
Usage:
const express = require('express');
const session = require('express-session');
const { old } = require('express-sesssion-helpers');
const bodyParser = require('body-parser');
const app = express();
// To accept form data
app.use(bodyParser.urlencoded({
extended: false
}));
app.use(session({
secret: 'lol'
}));
// This needs to be AFTER app.use(session())
app.use(old());
app.post('/login', function(req, res, next) {
// do your validation
// if it fails e.g. because the user didnt fill out their name
// send back any validation errors using something like flash()
// and send back their old input to prefill the fields
req.sendBackInput();
res.redirect('/login');
});
// app.get('/login') etc...Then magically in your view, you have access to am old variable.
<!-- template engine is nunjucks -->
<input type="email" name="email" value="{{ old.email if old.email else '' }}"
