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Express.js is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications. One of the key aspects of building dynamic web applications is rendering views or templates. Express supports various templating engines, allowing developers to choose the one that best fits their needs.
In this tutorial, we will explore how to integrate three popular templating engines with Express.js: EJS (Embedded JavaScript), Pug (formerly Jade), and Handlebars. Each of these engines has its own syntax and features, making them suitable for different types of projects.
A templating engine is a tool that allows you to generate HTML dynamically by embedding expressions within static text. This is particularly useful for creating reusable templates that can be rendered with different data.
Express.js provides middleware to integrate various templating engines seamlessly. By using these engines, you can separate your application's logic from its presentation layer, making your code cleaner and more maintainable.
EJS is a simple templating language that lets you generate HTML with plain JavaScript. It uses <% %> for control flow, <%= %> to output expressions, and <%- %> to output unescaped expressions.
First, install the EJS package using npm:
Navigate to http://localhost:3000 in your browser, and you should see the rendered HTML with the data passed from the server.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Hello World</title> </head> <body> <h1>Welcome to Express.js with EJS!</h1> </body> </html>
Pug is a high-performance templating engine that compiles into HTML. It uses indentation to define the structure of the document, making it concise and easy to read.
Install the Pug package using npm:
Navigate to http://localhost:3000 in your browser, and you should see the rendered HTML with the data passed from the server.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Hello World</title> </head> <body> <h1>Welcome to Express.js with Pug!</h1> </body> </html>
Handlebars is a logic-less templating engine that compiles into HTML. It uses double curly braces {{ }} for embedding expressions and supports helpers for more complex operations.
Install the Handlebars package using npm:
Navigate to http://localhost:3000 in your browser, and you should see the rendered HTML with the data passed from the server.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Hello World</title> </head> <body> <h1>Welcome to Express.js with Handlebars!</h1> </body> </html>
In this tutorial, we explored how to integrate three popular templating engines (EJS, Pug, and Handlebars) with Express.js. Each engine has its own strengths and is suitable for different types of projects.
If you're interested in learning more about EJS templates specifically, consider exploring advanced features like partials, layouts, and filters. These features can help you build more complex and maintainable web applications.
Happy coding!