Nest.js VS EJS

• Modular Architecture
  Nest.js uses a modular architecture which is highly organized and maintainable. This allows for better separation of concerns and makes it easier to manage large-scale applications by dividing them into smaller, reusable modules.
• TypeScript Support
  Nest.js is built with TypeScript, providing strong typing and compile-time checks. This leads to fewer runtime errors and improved code readability and maintainability.
• Dependency Injection
  The framework includes a powerful dependency injection system, which enables better testability and easier management of application components.
• Built-in Middleware
  Nest.js supports middleware out of the box, allowing developers to easily add additional request-processing logic at different points in the request lifecycle.
• Extensive Documentation
  Nest.js offers comprehensive and detailed documentation, which helps developers quickly get up to speed and resolve issues more efficiently.
• Scalability
  The framework is designed to be scalable, making it suitable for projects of varying sizes—from small applications to large enterprise-level systems.
• Integration with Modern Libraries
  Nest.js seamlessly integrates with modern libraries and frameworks such as GraphQL, WebSockets, and TypeORM, extending its capabilities and allowing for versatile development options.
• Active Community
  An active and growing community around Nest.js means there are plenty of resources, tutorials, and third-party tools available to assist with development.

Possible disadvantages

• Learning Curve
  Due to its rich feature set and use of TypeScript, Nest.js can have a steep learning curve for developers who are not familiar with these technologies.
• Overhead
  The reliance on the decorators and classes can introduce additional overhead, potentially making simple projects more complex than necessary.
• Limited Flexibility
  Nest.js follows an opinionated architecture pattern, which can be restrictive for developers who prefer a more flexible or unstructured approach.
• Performance
  While Nest.js is generally performant, the abstraction layers and TypeScript compile steps can introduce slight performance overhead compared to more lightweight alternatives.
• Dependency on TypeScript
  The heavy reliance on TypeScript can be a drawback for developers who prefer to use plain JavaScript, or who are not familiar with TypeScript.
• Community Compared to Mainstream Frameworks
  Although the Nest.js community is active and growing, it is still smaller compared to more established frameworks like Express.js or Koa, potentially limiting the amount of shared knowledge and third-party packages available.

• Simplicity
  EJS is easy to learn and use, especially for developers who are already familiar with JavaScript. The syntax is straightforward, making it a good choice for quick application development.
• JavaScript Integration
  Since EJS templates are JavaScript files, you can seamlessly integrate JavaScript code, making it easy to manipulate data and use familiar JavaScript functions.
• Lightweight
  EJS is a lightweight template engine, which makes it an optimal choice for applications where performance and simplicity are critical.
• Flexibility
  Allows for the embedding of plain JavaScript within the templates, giving developers the flexibility to add logic directly in their HTML.
• Partial Templates
  Supports partials, which help to reuse code snippets across different views, promoting DRY (Don't Repeat Yourself) principles.
• Server-Side Rendering
  Supports server-side rendering, which can improve performance by reducing the amount of client-side processing needed.

Possible disadvantages

• Limited Functionality
  Compared to more feature-rich template engines like Handlebars or Pug, EJS offers limited functionalities which might be a drawback for large, complex projects.
• Debugging
  Debugging EJS templates can sometimes be challenging. Errors within templates can often be vague, making it difficult to trace the root cause.
• Maintenance
  Embedding a lot of JavaScript within templates can make the code harder to read and maintain, especially as the complexity of the application grows.
• Performance Overhead
  For very large and complex templates, EJS can introduce a performance overhead compared to more optimized template engines designed for high performance.
• Community and Support
  While EJS has a reasonable user base, the community and support may not be as extensive as more popular alternatives like React or Vue.js.

Why I chose Nest.js over Express.js in 2020

Kane Creek - Bestop Trail Review at EJS 2019

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