EJS, or Embedded JavaScript, is a templating language that allows developers to generate HTML markup using JavaScript. It enables dynamic content insertion into HTML pages by embedding JavaScript code directly within HTML templates, making it easier to build server-rendered web applications.
EJS is commonly used in Node.js back-end environments, particularly with the Express.js framework, to serve dynamic web pages. Developers use EJS to create reusable templates for layouts, headers, footers, and partial views, reducing redundancy and improving maintainability. The syntax supports plain HTML with special tags (, , ) to output data, include partials, or execute logic.
- Generate dynamic HTML pages using JavaScript
- Integrate with Express.js for server-side rendering
- Embed variables, loops, and conditionals in templates
- Support partial templates for modular design
- Output escaped or unescaped content based on security needs
- Maintain clean separation between logic and presentation
Proficiency in EJS typically includes understanding template inheritance, proper escaping to prevent cross-site scripting (XSS) vulnerabilities, and structuring views for scalability. It is commonly used by back-end developers, full-stack developers, and Node.js engineers in applications requiring server-rendered content, such as content management systems, dashboards, and internal tools. While newer frameworks often favor client-side rendering, EJS remains relevant in contexts where server-side rendering improves performance or SEO.