Cons of EJS

1. Mixing Logic with Presentation:

However, it is worth noting that though JavaScript code can be embedded in templates, this can have its negative impact. This is because mixing logic with presentation in the same file may lead to code that is more difficult to read and maintain especially in larger projects.

<!-- Mixing logic with presentation example -->
<% if (user.isAdmin) { %>
  <p>Welcome, Admin!</p>
<% } else { %>
  <p>Welcome, User!</p>
<% } %>

2. Limited Features Compared to Other Engines:

EJS provides basic functionality for templating and it might not have all the advanced features like some other template engines do. Developers who need more complicated templating jobs may find EJS less convenient compared with other more feature-rich alternatives.

3. Performance Concerns:

Also, there are cases where EJS might suffer performance issues particularly when dealing with many templates or complex logic inside templates. With strict performance requirements for a given project, developers have to take into account performance implications and explore alternatives.

NodeJS, an influential JavaScript runtime, is becoming increasingly popular for the development of scalable, fast server-side applications. EJS (Embedded JavaScript) is among the leading templating engines for NodeJS. Here we shall discuss some merits and demerits of using this template engine in your work.