Template Engines
Template engines are software tools that process templates (files with placeholders or logic) and data to generate dynamic output, typically HTML for web applications. They separate presentation logic from business logic, allowing developers to embed variables, loops, and conditionals in markup. Common examples include Jinja2, Handlebars, and EJS, which help create reusable and maintainable user interfaces.
Developers should use template engines when building web applications to dynamically render content, such as user-specific data or product listings, without cluttering code with HTML strings. They are essential for server-side rendering in frameworks like Django or Express.js, improving code organization and reducing duplication. Template engines also enhance security by automatically escaping user input to prevent XSS attacks.