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← Using locals and conditional templates

index.js

var express = require('express');
var app = express();
var routes = require('./routes');

app.set('view engine', 'ejs');

app.locals.pagetitle = 'Awesome Website';

app.get('/', routes.index);
app.get('/about', routes.about);

// si on a autre chose
app.get('*', function (req, res) {
  console.log('Page inconnue demandée');
  res.render('default', { title: '😭', content: '😭😭😭' });
});

var server = app.listen(3000, function () {
  console.log('Listening on port 3000.');
});

/routes/index.js

exports.index = function(req, res) {
  res.render('default', {
    title: 'Home',
    content: 'Bonjour.',
    users: ['Marie-Joëlle', 'Philippe', 'Jacques'],
  })
}

exports.about = function(req, res) {
  res.render('default', {
    title: 'About us',
    content: 'Ah ben c\'est nous !',
    users: ['Marie-Joëlle'],
  })
}

default.ejs

<!DOCTYPE html>
<html>
<head><% include partials/head.ejs %></head>
<body>
<h1><%= pagetitle %> - <%= title %></h1>
<p><%= content %></p>

<% if (typeof(users) !== 'undefined') { %>
  <h2>Utilisateurs connectés</h2>
  <ul>
  <% for (var i=0; i <users.length; i++) {%>
    <li><%= users[i] %></li>
  <% } %>
  </ul>
<% } %>

</body>
</html>