MaintainableCSS is an online book and methodology for writing modular, scalable CSS that avoids conflicts with pre-existing styles, hosted on a Jekyll-powered website.
What is MaintainableCSS?
MaintainableCSS is a methodology and online book written to solve the problem of CSS styles that interfere with each other as projects grow. It takes the form of a static website maintained on GitHub, built with the Jekyll static site generator. The project's GitHub repository has 837 stars and lists topics such as CSS, maintainability, modularity, scalability, and web. The book defines a set of guidelines and examples for writing CSS in self-contained modules so that adding new components does not require untangling old, overzealous rules.
What makes MaintainableCSS stand out?
- Modular component approach — each piece of CSS is written as an independent module, so styles are scoped and don't leak into unrelated parts of the page.
- Scalability focus — the approach is designed for projects that grow, with conventions that keep styles predictable over time.
- Conflict prevention — the core promise is that you can add new CSS without worrying that pre-existing styles will break your markup.
- Public GitHub repository — the project is hosted on GitHub with 837 stars, making it easy to contribute feedback or improvements.
- Jekyll static site — the website is built with Jekyll, meaning it is a static, fast-loading site that can be hosted on GitHub Pages.
- Web-based reading — the entire book is accessible at maintainablecss.com, so you can read it in the browser without installing anything.
Who is MaintainableCSS for?
- CSS developers who maintain large stylesheets and want a structured way to write new styles without breaking existing components.
- Front-end teams that need a common CSS architecture to standardize across multiple projects and developers.
- Developers new to CSS methodologies who want a practical, example-driven guide to modular CSS instead of abstract theory.
What can you do with MaintainableCSS?
- Front-end developers: apply the module rules when building new UI components so they remain visually and functionally isolated from the rest of the page.
- Team leads: adopt the approach as a team guideline to keep the stylesheet maintainable as the codebase scales and the team grows.
- Learners: read the online book to understand a concrete, repeatable way to structure CSS, then apply it to personal projects.
Alternatives
- BEM — another CSS methodology that emphasizes block-element-modifier naming conventions.
- SMACSS — a style guide that categorizes CSS rules into five types (base, layout, module, state, theme).
FAQ
Is MaintainableCSS a framework or library?
MaintainableCSS is not a framework or library. It is a methodology and a book that describes how to write CSS manually in a modular way, without requiring any specific build tool or dependency.
Where can I read MaintainableCSS?
The full content is published on the website maintainablecss.com. The source is available on GitHub, where the repository has 837 stars.
What technology is the website built with?
The site is generated with Jekyll, a static site generator. This means it can be hosted as static files, for example on GitHub Pages.
