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EJS VS Underscore.js

Compare EJS VS Underscore.js and see what are their differences

EJS logo EJS

An open source JavaScript Template library.

Underscore.js logo Underscore.js

Underscore is a utility-belt library for JavaScript that provides a lot of the functional...
  • EJS Landing page
    Landing page //
    2022-01-11
  • Underscore.js Landing page
    Landing page //
    2018-12-17

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.

Underscore.js features and specs

  • Utility Functions
    Underscore.js provides a wealth of utility functions for common tasks such as map, reduce, filter, and more, making it easier to perform operations on arrays, objects, and collections.
  • Consistency
    The library offers a consistent API, which can make your code more readable and maintainable by providing a standard way to perform common programming tasks.
  • Lightweight
    Underscore.js is lightweight compared to full-featured libraries like Lodash, which can be a benefit if you're looking to minimize your application's footprint.
  • Browser Compatibility
    It supports a wide range of JavaScript environments, making it a good choice for projects that need to work across different browsers and Node.js.
  • Quick to Learn
    Easy to pick up for developers with even a basic understanding of JavaScript, due to its straightforward documentation and familiar function names.

Possible disadvantages of Underscore.js

  • Performance
    Underscore.js may not offer the same level of performance optimizations as more modern utility libraries like Lodash, potentially leading to slower execution for some tasks.
  • Limited Functionality
    While it covers many basic utility functions, its feature set is not as extensive as Lodash or other similar libraries, which provide a broader range of capabilities.
  • Outdated
    With the advent of ECMAScript 5 and later versions, many of the functions provided by Underscore.js are now natively available in JavaScript, reducing its necessity.
  • No Modularization
    Underscore does not support modular builds in the same way Lodash does, meaning you might end up including the entire library even if you only need a few functions.
  • Community and Maintenance
    While still maintained, Underscore.js has seen less active development and contributions compared to newer libraries, which could impact its long-term viability and support.

EJS videos

Kane Creek - Bestop Trail Review at EJS 2019

More videos:

  • Tutorial - JavaScript Templating Tutorial | Introduction To EJS

Underscore.js videos

Introduction to Underscore.JS

Category Popularity

0-100% (relative to EJS and Underscore.js)
Javascript UI Libraries
32 32%
68% 68
Development
100 100%
0% 0
Development Tools
0 0%
100% 100
Front-End Frameworks
100 100%
0% 0

User comments

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Social recommendations and mentions

EJS might be a bit more popular than Underscore.js. We know about 26 links to it since March 2021 and only 23 links to Underscore.js. 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 / 2 months 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 / 2 months 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 / 6 months 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 / 9 months 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 / 10 months ago
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Underscore.js mentions (23)

  • JavaScript evolution: From Lodash and Underscore to vanilla
    Underscore was created by Jeremy Ashkenas (the creator of Backbone.js) in 2009 to provide a set of utility functions that JavaScript lacked at the time. It was also created to work with Backbone.js, but it slowly became a favorite among developers who needed utility functions that they could just call and get stuff done with without having to worry about the inner implementations and browser compatibility. - Source: dev.to / 5 months ago
  • KlongPy: High-Performance Array Programming in Python
    There was a step-change improvement for me when I tried expressing some JS patterns via `underscore.js` instead of procedurally: eg: http://underscorejs.org/#each Thinking of something as `each | map | filter | sum` is waaay less buggy than writing bespoke procedural code to do the same thing. No doubt there is a "cost" to it as well, but the _abstraction_ is valuable. Now, if there were a "compiler" which could... - Source: Hacker News / 5 months ago
  • 100+ Must-Have Web Development Resources
    Underscore.js: A utility library that offers a full set of functional programming helpers without extending any built-in JavaScript objects. - Source: dev.to / 7 months ago
  • Mastering Node.js
    Underscore contains just about every core utility method you want. - Source: dev.to / 10 months ago
  • 8 NPM Packages for JavaScript Beginners [2024][+tutorials]
    Not too far behind is Underscore.js, another utility library that's all about enhancing your JavaScript mojo. Whether you're dealing with arrays, objects, or strings, Underscore has got something for you. It's like Lodash's sibling, offering similar functionalities but with its own flair. The choice between them is like picking between chocolate and vanilla - it really comes down to personal taste. - Source: dev.to / about 1 year ago
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What are some alternatives?

When comparing EJS and Underscore.js, you can also consider the following products

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

jQuery - The Write Less, Do More, JavaScript Library.

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

React Native - A framework for building native apps with React

Vue.js - Reactive Components for Modern Web Interfaces

Babel - Babel is a compiler for writing next generation JavaScript.