1. Install Handlebars Engine

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npm install express-handlebars

2. Setup Handlebars in app.js

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const express = require('express');
const exphbs = require('express-handlebars');
const app = express();

app.engine('hbs', exphbs.engine({ extname: '.hbs' }));
app.set('view engine', 'hbs');
app.set('views', './views');

3. Create Folder Structure

  ├── layouts/
  │     └── main.hbs
  ├── home.hbs
  ├── product-list.hbs
  ├── product-detail.hbs
  ├── login.hbs
  └── register.hbs

4. Create Main Layout

views/layouts/main.hbs:

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title></title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css">
</head>
<body>
  <div class="container mt-5">
    }
  </div>
</body>
</html>

5. Render Homepage

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const express = require('express');
const router = express.Router();
const Product = require('../models/Product');

router.get('/', async (req, res) => {
  const products = await Product.find();
  res.render('home', {
    title: 'Home',
    products
  });
});

module.exports = router;

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const pageRoutes = require('./routes/pages');
app.use('/', pageRoutes);

6. Create Product List View

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<h1 class="mb-4">Product List</h1>

<div class="row">
  
    <div class="col-md-4">
      <div class="card mb-4">
        <div class="card-body">
          <h5></h5>
          <p>Price: $</p>
          <a href="/product/" class="btn btn-primary btn-sm">View</a>
        </div>
      </div>
    </div>
  
</div>

7. Create Product Detail View

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router.get('/product/:id', async (req, res) => {
  const product = await Product.findById(req.params.id);
  res.render('product-detail', {
    title: product.name,
    product
  });
});

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<h2></h2>
<p><strong>Price:</strong> $</p>
<p></p>
<a href="/" class="btn btn-secondary btn-sm">Back</a>

8. Render Auth Pages

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router.get('/login', (req, res) => {
  res.render('login', { title: 'Login' });
});

router.get('/register', (req, res) => {
  res.render('register', { title: 'Register' });
});

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<h2>Login</h2>
<form action="/api/auth/login" method="POST">
  <input name="email" type="email" placeholder="Email" class="form-control mb-2" />
  <input name="password" type="password" placeholder="Password" class="form-control mb-2" />
  <button type="submit" class="btn btn-primary">Login</button>
</form>

Notes