๐งฉ Mastering EJS Templating in Node.js: Why and How to Use It
When building dynamic web applications with Node.js, one of the most common challenges developers face is managing dynamic content on webโฆ
๐งฉ Mastering EJS Templating in Node.js: Why and How to Use It
When building dynamic web applications with Node.js, one of the most common challenges developers face is managing dynamic content on web pages โ things like user data, form inputs, or database results. Thatโs where EJS (Embedded JavaScript Templates) steps in as a simple yet powerful solution.
In this article, weโll explore what EJS is, why itโs useful, its advantages, and how to set it up and use it effectively in a Node.js application.
What is EJS?
EJS (Embedded JavaScript) is a templating engine for Node.js that allows you to generate HTML dynamically using JavaScript. Think of it as a way to combine HTML and JavaScript logic to render views based on data.
It works by embedding JavaScript directly inside your HTML using special tags:
<%= %> โ Output the value into HTML (escaped)
<%- %> โ Output unescaped HTML
<% %> โ Execute JavaScript code (no output)For example:
<h1>Hello, <%= user.name %>!</h1>If user.name is "Mujtaba", this will render:
<h1>Hello, Mujtaba!</h1>Why Use EJS?
When youโre building web apps with Express.js (or any Node.js framework), you often need a way to render server-side views. While front-end frameworks like React or Vue are popular today, server-side templating still plays a vital role in many applications โ especially where SEO, fast initial rendering, or simplicity is important.
Hereโs why developers still love EJS:
-
Simplicity EJS is incredibly straightforward โ no need to learn a complex syntax or new language. If you know HTML and basic JavaScript, you can start using EJS immediately.
-
Lightweight and Fast EJS doesnโt add heavy overhead or dependencies. Itโs minimal, fast, and integrates perfectly with Express.js.
-
Server-Side Rendering (SSR) EJS renders your templates on the server and sends fully-formed HTML to the client. This improves SEO and ensures faster first-page loads compared to client-side rendering.
-
Code Reusability With partials (reusable template components), you can break your UI into smaller chunks โ like headers, footers, or navbars โ and reuse them across multiple pages.
-
Easy Data Binding You can easily inject dynamic data (from a database, API, or backend logic) directly into your HTML templates.
Setting Up EJS in a Node.js Project
Letโs go through the basic setup step by step.
Step 1: Create a New Node.js Project
Run the following commands:
mkdir ejs-demo
cd ejs-demo
npm init -yStep 2: Install Dependencies
Weโll need Express.js and EJS:
npm install express ejsStep 3: Project Structure
Create a basic folder structure:
ejs-demo/
โ
โโโ views/
โ โโโ index.ejs
โ โโโ about.ejs
โ โโโ partials/
โ โโโ header.ejs
โ โโโ footer.ejs
โ
โโโ app.jsStep 4: Configure Express to Use EJS
In your app.js:
const express = require('express');
const app = express();
const PORT = 3000;
// Set EJS as the templating engine
app.set('view engine', 'ejs');
// Define routes
app.get('/', (req, res) => {
const user = { name: 'Mujtaba', role: 'Full Stack Developer' };
res.render('index', { user });
});
app.get('/about', (req, res) => {
res.render('about');
});
// Start server
app.listen(PORT, () => {
console.log(`Server running on http://localhost:${PORT}`);
});Step 5: Create Your EJS Templates
views/index.ejs
<%- include('partials/header') %>
<h1>Welcome, <%= user.name %>!</h1>
<p>Your role: <%= user.role %></p>
<a href="/about">Go to About Page</a>
<%- include('partials/footer') %>views/partials/header.ejs
<!DOCTYPE html>
<html>
<head>
<title>EJS Demo</title>
</head>
<body>
<header>
<h2>My EJS App</h2>
<hr>
</header>views/partials/footer.ejs
<hr>
<footer>
<p>ยฉ 2025 EJS Demo App</p>
</footer>
</body>
</html>Now, run your server:
node app.jsVisit ๐ **http://localhost:3000** โ and youโll see a clean EJS-powered dynamic website!
Tips for Using EJS Effectively
- Use Partials: Create reusable layouts for headers, footers, and navbars.
- Separate Logic from Views: Keep heavy business logic in your controllers, not inside EJS.
- Use Layout Libraries: Tools like
express-ejs-layoutscan help maintain consistent layouts. - Combine with CSS Frameworks: You can easily add Bootstrap or Tailwind for styling.
EJS remains one of the simplest yet most effective templating engines in the Node.js ecosystem.
Itโs perfect for projects where you need:
- Dynamic HTML generation
- Server-side rendering
- Simple integration with Express.js
While modern front-end frameworks often dominate the spotlight, EJS is still a go-to choice for many developers who value simplicity, speed, and control on the server side
So the next time you start a Node.js project and need server-rendered views, give EJS a try โ you might be surprised by how powerful and straightforward it is.
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