stubbornella/oocss
Oocss
Object-Oriented CSS (OOCSS) is a CSS methodology and framework that structures stylesheets around reusable, composable classes. Its core principle is separating layout and structure from visual design, allowing the same structural classes to work with different visual treatments. The approach encourages styling elements based on their own properties rather than their location in the DOM, making components portable across different contexts.
The methodology is built on class composition, where complex visual patterns are created by combining multiple single-purpose CSS classes on a single element. This avoids duplicating style rules and keeps selector specificity low, enabling easy overrides and composition without deep nesting or !important. A consistent, descriptive naming convention for classes ensures predictability and prevents specificity conflicts across the stylesheet.
OOCSS provides a grid system for consistent layout management and promotes building modular, reusable component classes that can be mixed and matched across a site. The framework includes predefined classes for common visual patterns, allowing developers to compose designs without writing custom positioning rules for each element.
Features
- Object-Oriented - Provides a CSS methodology that encourages reusable, composable classes for styling elements by their properties rather than DOM location.
- CSS Class - Defines a consistent naming system for CSS classes to ensure predictability and avoid specificity conflicts.
- CSS Object Abstractions - Encapsulates common visual patterns into reusable CSS objects for mixing across components.
- CSS Object-Oriented Architectures - Structures stylesheets around reusable, context-independent classes that separate layout from visual design.
- Layout-Design Separation - Implements a core principle of separating layout structure from visual design in CSS.
- CSS Property-Based Selectors - Styles elements by their own properties rather than DOM location for portable components.
- CSS Layout-Design Separations - Separates layout and positioning rules from visual design to enable reusable structural classes.
- Selector Specificity Restrictions - Keeps selector specificity low to allow easy overrides and composition without deep nesting or !important.
- CSS Utility Classes - Defines modular, composable CSS classes that can be mixed and matched across a site to avoid duplicating styles.
- Component Styling - Styles elements based on their own properties rather than DOM location to make components work consistently across contexts.
- Context-Independent Styling Techniques - Provides a methodology for styling components independently of their DOM context for reuse.
- Visual-Structural Separations - Defines layout and positioning rules independently of visual design for reusable structural classes.
- CSS Content-Container Separations - Styles elements based on their own class names rather than DOM location for portable components.
- CSS Class-Based Styling - Provides a methodology for composing visual patterns by combining single-purpose CSS classes on elements.
- Grid Layout Systems - Uses a predefined grid of column classes to arrange content consistently without writing custom positioning rules.
- CSS Layout-Design Separations - Decouples structural layout classes from visual design classes for greater portability and reuse.
- Style Property Manipulators - Styles elements based on their own properties rather than DOM location for portable components.
- CSS Styling Libraries - Methodology for object-oriented CSS architecture.
Star history
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