Software Alternatives, Accelerators & Startups

EJS VS Flask

Compare EJS VS Flask and see what are their differences

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EJS logo EJS

An open source JavaScript Template library.

Flask logo Flask

a microframework for Python based on Werkzeug, Jinja 2 and good intentions.
  • EJS Landing page
    Landing page //
    2022-01-11
  • Flask Landing page
    Landing page //
    2023-07-24

EJS features and specs

  • 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 of EJS

  • 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.

Flask features and specs

  • Simplicity
    Flask is a micro-framework, meaning it is lightweight, easy to understand, and simple to use. It requires minimal setup to get a web application up and running.
  • Flexibility
    Flask provides flexibility and control over the application's architecture, allowing developers to choose the components they need and avoid unnecessary bloat.
  • Extensibility
    Flask supports various extensions to add capabilities like database integration, form validation, and authentication without compromising its core simplicity.
  • Documentation
    Flask has comprehensive and well-organized documentation, making it easier for developers to learn and implement features effectively.
  • Community
    Flask has a large and active community, providing ample resources like tutorials, code snippets, and third-party libraries that can help speed up development.
  • Testing
    Flask is designed to be unit tested easily, allowing developers to test their applications and ensure reliability.

Possible disadvantages of Flask

  • Scalability
    Flask may not be as scalable as some other frameworks for very large applications due to its minimalist design and lack of built-in features.
  • Boilerplate Code
    Since Flask requires you to integrate and configure many components manually, codebases in Flask can sometimes contain a lot of boilerplate code.
  • Opinionated Architecture
    While Flask provides flexibility, it also means there are fewer conventions. Developers must make more architectural decisions, which can be challenging for large team collaboration.
  • Limited Tools
    Compared to more comprehensive frameworks, Flask offers fewer built-in tools and features, which may necessitate additional plugins or custom implementations.
  • Learning Curve for Complex Applications
    While Flask is easy to learn for simple applications, it can become complex to manage as the application grows, requiring a good understanding of design patterns and software architecture.

Analysis of EJS

Overall verdict

  • Yes, EJS is considered good, particularly for projects where developers want ease of use and flexibility with JavaScript templating. It is lightweight, easy to learn, and integrates well with Express, a popular Node.js web application framework.

Why this product is good

  • EJS (Embedded JavaScript Templating) is popular because it provides a simple way to generate HTML markup with plain JavaScript. It allows for the embedding of JavaScript logic within your HTML templates, making it straightforward to use for those familiar with JavaScript. It's known for its efficiency in rendering templates and ease of integration with Node.js applications.

Recommended for

    EJS is recommended for developers building server-side web applications using Node.js and those looking for a simple, yet effective, templating solution. It is particularly suitable for small to medium-sized projects where dynamic content generation is needed and for teams that prioritize simplicity and performance.

Analysis of Flask

Overall verdict

  • Flask is a good choice for developers looking for a lightweight and flexible framework for building web applications, particularly if they value simplicity and control over out-of-the-box features.

Why this product is good

  • Flask is a microframework for Python, offering simplicity and flexibility, making it a good choice for small to medium-sized applications.
  • It has a simple core with easy-to-add extensions, allowing developers to customize their applications as needed.
  • Flask's lightweight nature means it has a small overhead, leading to faster development cycles and easier debugging.
  • It has a strong community and excellent documentation, providing ample resources for learning and troubleshooting.

Recommended for

  • Developers who prefer Python and want a minimalist approach to web development.
  • Those working on small to medium-sized applications or microservices.
  • Developers who appreciate a modular and extensible architecture.
  • Teams that require rapid prototyping or quick deployment cycles.

EJS videos

Kane Creek - Bestop Trail Review at EJS 2019

More videos:

  • Tutorial - JavaScript Templating Tutorial | Introduction To EJS

Flask videos

Built To Last A Life Time - Ragproper Modern Glass Flask Review

More videos:

  • Review - The Hip Flask Guide - Gentleman's Gazette
  • Review - 10 Best Flasks 2019

Category Popularity

0-100% (relative to EJS and Flask)
Javascript UI Libraries
100 100%
0% 0
Web Frameworks
0 0%
100% 100
Development
68 68%
32% 32
Developer Tools
0 0%
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare EJS and Flask

EJS Reviews

We have no reviews of EJS yet.
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Flask Reviews

The 20 Best Laravel Alternatives for Web Development
Flask is the micro that’s got your back without trying to run the show. It comes with the essentials but trusts you to pick your tools — no baggage attached, truly Pythonic at heart.
Top 9 best Frameworks for web development
The best frameworks for web development include React, Angular, Vue.js, Django, Spring, Laravel, Ruby on Rails, Flask and Express.js. Each of these frameworks has its own advantages and distinctive features, so it is important to choose the framework that best suits the needs of your project.
Source: www.kiwop.com
25 Python Frameworks to Master
You’ll also have access to some extension packages like Flask-RESTful, which adds support for building powerful REST APIs, and Flask-SQLAlchemy, a convenient way to use SQLAlchemy in your flask app.
Source: kinsta.com
3 Web Frameworks to Use With Python
Flask is a micro web framework for building web applications with Python. Here is the official web page of Flask.
Top 10 Phoenix Framework Alternatives
Flask is a micro-framework, i.e., it does not bundle tools and libraries and instead uses third party libraries to deliver functionalities.

Social recommendations and mentions

Based on our record, Flask should be more popular than EJS. It has been mentiond 42 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

EJS mentions (26)

  • Next.js vs Express: What to Choose in 2025?
    Express does not provide SEO benefits by default and would require additional configuration with tools like EJS (Embedded JavaScript) or Handlebars for server-side rendering. - Source: dev.to / over 1 year ago
  • Chapter 7: HTML part two
    For a more robust approach, we'd probably need to install a templating language of some kind, such as Twig, EJS, Handlebars, Pug or Mustache (this is not a complete list!). Reading the documentation for posthtml-modules, you'll notice it doesn't mention package.json or any of the approaches we've used in this guide. Instead, the examples are in JavaScript and we've advised to add this to our Node application. - Source: dev.to / over 1 year ago
  • Web Components and SSR - 2024 Edition
    Server-side Framework SSR is when you use a framework that runs the HTML templating logic entirely on the server to compose the HTML that will be rendered in the browser. These are frameworks like Ruby on Rails, ASP.Net, PHP, or even Node.js frameworks that use templating languages like Pug or EJS. - Source: dev.to / almost 2 years ago
  • How to Build an Application With Node.js
    We need a templating engine to render HTML code in the browser using Node.js. We'll use ejs (Embedded JavaScript) for this tutorial but there are others such as Pug (formerly known as Jade) and Express Handlebar, which also render HTML on the server. - Source: dev.to / about 2 years ago
  • Getting to the meat and potatoes of serverless recipe parsing with Amazon Bedrock
    The tags is where you put the HTML you want Claude to read. The <%- document %> contained within is an ejs placeholder. More on this shortly. - Source: dev.to / about 2 years ago
View more

Flask mentions (42)

  • PSET 9 Finance - What is "disable response caching" and the function they ask to notice
    "After configuring Flask, notice how this file disables caching of responses (provided you’re in debugging mode, which you are by default in your code50 codespace), lest you make a change to some file but your browser not notice. ". Source: over 3 years ago
  • How to Send an Email in Python
    Flask, which offers a simple interface for email sending— Flask Mail. (Check here how to send emails with Flask). - Source: dev.to / almost 4 years ago
  • Plotting Bookmarks with Flask, Matplotlib, and OAuth 2.0
    Lang="en"> Plot Bookmarks!{% block title %}{% endblock %} rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" /> class="container"> Plot Bookmarks by Date {% block containercontent %}{% endblock %} /> class="footer"> class="text-muted"> >This is a... - Source: dev.to / about 4 years ago
  • Determining what version of Flask is installed
    What's the easiest way to determine which version of Flask is installed? Source: over 4 years ago
  • What is the point of uWSGI?
    I'm looking at the WSGI specification and I'm trying to figure out how servers like uWSGI fit into the picture. I understand the point of the WSGI spec is to separate web servers like nginx from web applications like something you'd write using Flask. What I don't understand is what uWSGI is for. Why can't nginx directly call my Flask application? Can't flask speak WSGI directly to it? Why does uWSGI need to get... Source: over 4 years ago
View more

What are some alternatives?

When comparing EJS and Flask, you can also consider the following products

Mustache.js - Minimal templating with {{mustaches}} in JavaScript - janl/mustache.js

Django - The Web framework for perfectionists with deadlines

Handlebars - Handlebars is a JavaScript template library that is, more or less, based on ...

Ruby on Rails - Ruby on Rails is an open source full-stack web application framework for the Ruby programming...

Vue.js - Reactive Components for Modern Web Interfaces

ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple