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CSS Modules VS Sass

Compare CSS Modules VS Sass and see what are their differences

CSS Modules logo CSS Modules

I’ve been intrigued by CSS Modules lately. If you haven't heard of them, this post is for you. We'll be looking at the project and it's goals and aims. If

Sass logo Sass

Syntatically Awesome Style Sheets
  • CSS Modules Landing page
    Landing page //
    2023-02-21
  • Sass Landing page
    Landing page //
    2021-09-19

CSS Modules features and specs

No features have been listed yet.

Sass features and specs

  • Nesting
    Sass allows for nested syntax, making it easier to target specific elements and providing a clear, hierarchical structure to CSS code.
  • Variables
    Sass supports variables that can store values such as colors, fonts, or any CSS value, making it simple to maintain and update styles.
  • Mixins
    Mixins in Sass enable reusable chunks of code, which can dramatically reduce redundancy and simplify complex CSS.
  • Partials and Import
    With Sass, CSS can be split into smaller, more manageable partial files which are then imported into a central stylesheet, enhancing modularity and organization.
  • Control Directives
    Sass includes control directives (such as @if, @for, @each) that allow for conditional logic and loops, providing more dynamic CSS generation.
  • Built-in Functions
    Sass offers a variety of built-in functions for manipulating colors, strings, and other values, empowering developers to create more sophisticated styles.
  • Compass and Other Frameworks
    Sass can be extended with frameworks such as Compass, which provides additional mixins and functionality, speeding up development.
  • Community and Documentation
    Sass has a strong community and comprehensive documentation, which makes it easier to find solutions to problems and learn best practices.

Possible disadvantages of Sass

  • Learning Curve
    Sass introduces various features and syntax that may require additional time and resources to learn and adopt, especially for developers new to pre-processors.
  • Dependency on Compilation
    Sass needs to be compiled into standard CSS, which requires build tools and adds an extra step in the development workflow.
  • Tooling Requirements
    Using Sass effectively often involves additional tools like Node.js, npm, and task runners (e.g., Gulp, Grunt), which can complicate setup and maintenance.
  • Performance
    In large projects, the compilation time for Sass can become noticeable, potentially slowing down the development process, especially when dealing with extensive stylesheets.
  • Compatibility
    Older projects or those not built with modern development tools might face compatibility issues when integrating Sass, requiring significant refactoring.
  • Overhead
    For smaller projects, the overhead of setting up and maintaining Sass and its related tools may not be justified compared to the benefits gained.

CSS Modules videos

Josh Johnston: At Least 6 Ways to Win with CSS Modules

More videos:

  • Review - Styling React Components with CSS Modules | Styling react with CSS Classes | Data Is Good
  • Review - Styling LitElement views part 2: global styles and CSS modules (Vaadin Fusion)

Sass videos

The Armalite AR10 Super SASS

More videos:

  • Review - Armalite Super SASS
  • Review - M110 SASS to 800yds: Practical Accuracy (Leupold Mk4, US Sniper Rifle)
  • Review - Anatomy of the Semi Automatic Sniper System (SASS): Featuring the Lone Star Armory TX10 DM Heavy
  • Review - ArmaLite XM110 Rifle to AR10 Super SASS

Category Popularity

0-100% (relative to CSS Modules and Sass)
CSS Framework
13 13%
87% 87
Developer Tools
7 7%
93% 93
Design Tools
8 8%
92% 92
Development Tools
100 100%
0% 0

User comments

Share your experience with using CSS Modules and Sass. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Sass seems to be a lot more popular than CSS Modules. While we know about 144 links to Sass, we've tracked only 12 mentions of CSS Modules. 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.

CSS Modules mentions (12)

  • On why I prefer not to use elm-css
    ..., CSS Modules, CSS-in-JS, and Tailwind when I'm not constrained to do so. - Source: dev.to / 6 months ago
  • Is there really no better way to isolate styles across components than CSS modules?
    From what I read about CSS modules, the style isolation provides some guard rails to prevent things like random bits of global style or having colliding rules all over the place. This makes a lot of sense, but even on huge projects, I never really have those problems. I've disciplined myself to pair a component file with a CSS file (MyComponent.jsx + MyComponent.css) and keep global styles to a minimum. Source: about 2 years ago
  • Components with separate styles - how to do?
    Any time you import CSS files into a module, that CSS becomes active on EVERY component in your entire project, so that's not really a good way to go about it. It essentially creates a tag inside the final rendered html with all of your CSS within it. If you have two CSS files, and they both have a class of .myClass then they will step on each other and cause bad things to happen to your... Source: over 2 years ago
  • Why do bigger websites have the weirdest class and id names?
    They are probably using css modules. Source: over 2 years ago
  • No Caption..
    This may be a little more advanced but I'd also recommend looking into CSS modules. It basically allows you to scope your styles to individual elements preventing unwanted cascading, and simplifies naming conventions a lot (since the class names are now variables). Source: over 2 years ago
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Sass mentions (144)

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What are some alternatives?

When comparing CSS Modules and Sass, you can also consider the following products

styled-components - styled-components is a visual primitive for the component age that also helps the user to use the ES6 and CSS to style apps.

PostCSS - Increase code readability. Add vendor prefixes to CSS rules using values from Can I Use. Autoprefixer will use the data based on current browser popularity and property support to apply prefixes for you.

Autoprefixer - autoprefixer - Parse CSS and add vendor prefixes to rules by Can I Use

Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.

Less - Less extends CSS with dynamic behavior such as variables, mixins, operations and functions. Less runs on both the server-side (with Node. js and Rhino) or client-side (modern browsers only).

Stylus - EXPRESSIVE, DYNAMIC, ROBUST CSS