ExpressJS Templating

• ExpressJS Templating involves rendering dynamic content in response to HTTP requests using template engines.
• It allows developers to create HTML pages dynamically by injecting data into predefined templates.
• Express supports various template engines such as EJS, Pug (formerly Jade), Handlebars, and more.

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1. Overview

ExpressJS Templating enables developers to generate dynamic HTML content by combining static markup with data from the server. It offers the following benefits:

• Dynamic Content: Templating allows for the creation of dynamic web pages that can adapt to changing data.
• Reusability: Templates can be reused across multiple routes and views, reducing code duplication.
• Separation of Concerns: Templating separates the presentation layer from the business logic, improving code organization and maintainability.

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2. Example

Here's an example demonstrating templating in ExpressJS using the EJS template engine:

// Set EJS as the view engine
app.set('view engine', 'ejs');

// Define a route handler
app.get('/', (req, res) => {
    // Render a template and pass data to it
    res.render('index', { title: 'ExpressJS Templating', message: 'Welcome to ExpressJS Templating!' });
});

In this example, the res.render() method is used to render the index.ejs template and pass data to it for dynamic content generation.

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3. Using Template Engines

ExpressJS supports a variety of template engines. Some popular choices include:

• EJS (Embedded JavaScript): Allows embedding JavaScript code within HTML templates.
• Pug (formerly Jade): Offers a concise syntax for writing HTML templates.
• Handlebars: Provides a simple and flexible templating language with support for partials and helpers.

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4. Conclusion

ExpressJS Templating is a powerful feature that enables the creation of dynamic web pages in Express applications. By integrating template engines, developers can build flexible and maintainable applications that generate dynamic content efficiently.