Reflexbox
A responsive React flexbox grid system with CSS-in-JS for rapid layout composition.
What is Reflexbox?
Reflexbox is a React library that provides a flexbox-based grid system for building responsive layouts. It solves the problem of quickly creating consistent, composable UI components with minimal CSS by offering simple primitives like `<Flex />` and `<Box />` that handle spacing, alignment, and responsive behavior.
React developers who need a lightweight, responsive grid system for building UI layouts without heavy CSS frameworks or external dependencies.
Developers choose Reflexbox for its dead-simple API, built-in CSS-in-JS that eliminates external stylesheets, and responsive array props that streamline mobile-first design—all while promoting component reusability.
Overview
Moved to https://rebassjs.org
Use Cases
Best For
- Building responsive React applications with flexbox layouts
- Creating reusable UI component libraries with consistent spacing
- Prototyping layouts quickly with minimal CSS boilerplate
- Implementing mobile-first designs using array-based responsive props
- Wrapping custom components with flexbox styles via HOC
- Configuring custom spacing scales and breakpoints for design systems
Not Ideal For
- Applications requiring seamless server-side rendering in Node.js without version downgrades
- Projects needing a full suite of pre-styled UI components like buttons, modals, or forms
- Teams deeply invested in CSS Grid for complex layouts beyond flexbox capabilities
- Environments where runtime CSS-in-JS generation conflicts with performance or tooling preferences
Pros & Cons
Pros
The array-based props (e.g., `w={[1, 1/2, 1/4]}`) enable mobile-first responsive designs with minimal code, streamlining breakpoint management without media queries.
Built-in CSS-in-JS generates only necessary styles at runtime, reducing bloat and avoiding external dependencies, as highlighted in the README's feature list.
Through `<ReflexProvider />`, developers can customize spacing scales and breakpoints to align with design systems, offering adaptability beyond defaults.
Primitives like `<Flex />` and `<Box />` provide a clean, composable API for layout control, reducing boilerplate and promoting reusability.
Cons
The higher-order component (`reflex()`) does not work in Node.js server-side applications, forcing teams to use older versions or seek alternatives for SSR.
It's restricted to flexbox layouts, lacking built-in support for CSS Grid or other advanced techniques, which may limit complex or modern layout needs.
All styling is generated at runtime via CSS-in-JS, which can introduce performance concerns in large applications and lock teams into this approach.
Frequently Asked Questions
Related Projects
Flexbox layoutFlexbox for Android
FlexbugsA community-curated list of flexbox issues and cross-browser workarounds for them.
Solved by flexboxA showcase of problems once hard or impossible to solve with CSS alone, now made trivially easy with Flexbox.
FlexLayout for iOSFlexLayout adds a nice Swift interface to the highly optimized facebook/yoga flexbox implementation. Concise, intuitive & chainable syntax.
Found a gem we're missing?
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.