Sass flex mixin
A Sass mixin library for cross-browser Flexbox support with legacy browser fallbacks.
What is Sass flex mixin?
Sass Flex Mixin is a Sass library that provides mixins for implementing Flexbox layouts with automatic cross-browser compatibility. It solves the problem of writing and maintaining vendor-prefixed Flexbox code by generating both legacy and modern syntax versions, ensuring layouts work consistently across different browsers including older versions that required specific implementations.
Frontend developers working with Sass who need to support older browsers (particularly IE10 and older mobile WebKit browsers) while using modern Flexbox layout techniques.
Developers choose this library because it abstracts away the complexity of Flexbox vendor prefixes and syntax differences, providing a clean, maintainable way to implement responsive layouts that work across browser generations without manual prefix management.
Overview
Flexbox mixins
Use Cases
Best For
- Adding Flexbox support to projects that must maintain IE10 compatibility
- Simplifying cross-browser Flexbox implementation in Sass projects
- Migrating legacy layouts to Flexbox without breaking older browser support
- Maintaining consistent Flexbox syntax across different browser requirements
- Projects that can't use Autoprefixer or similar build tools
- Educational purposes for understanding Flexbox browser compatibility issues
Not Ideal For
- Projects targeting only modern browsers with native Flexbox support
- Build processes already integrated with Autoprefixer or similar prefixing tools
- Teams using CSS-in-JS or other CSS methodologies without Sass dependency
- New projects starting from scratch without legacy IE10 or older WebKit browser requirements
Pros & Cons
Pros
Automatically generates both legacy and modern Flexbox syntax, ensuring support for IE10 and older mobile WebKit browsers without manual code adjustments, as detailed in the README.
Handles all browser-specific prefixes and syntax variations, saving developers from writing and maintaining complex vendor-prefixed CSS, which simplifies cross-browser implementation.
Provides clean, reusable mixins that abstract away Flexbox complexities, making it easier to implement consistent layouts in Sass-based projects with minimal boilerplate.
Specifically designed for backward compatibility during Flexbox's adoption phase, offering a pragmatic solution for maintaining older browser support while using modern layout techniques.
Cons
The project is officially unmaintained as per the README warning, meaning no updates for new browser versions, bug fixes, or security patches, making it risky for production use.
Limited to Sass projects; it cannot be used with other CSS preprocessors or modern approaches like CSS-in-JS, reducing its applicability in contemporary frontend stacks.
Installation via Bower is recommended, but Bower is largely deprecated in favor of npm or yarn, adding friction and compatibility issues for modern development workflows.
Only handles Flexbox prefixes, whereas tools like Autoprefixer cover a wider range of CSS properties and are more future-proof, as admitted in the README's deprecation note.
Frequently Asked Questions
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