Learn METRO4 with Real Code Examples
Updated Nov 23, 2025
Architecture
Component-based CSS & JS
Grid and flexbox layout system
Metro-inspired visual design
Theme-driven via LESS variables
Integrated JS widgets for interactivity
Rendering Model
CSS for layout and styles
JS for interactive widgets
Flexbox and grid-based responsive system
Theme variables for customization
Direct DOM manipulation for widgets
Architectural Patterns
Component-driven UI
Tile-based navigation
Grid-first layout
JS widgets modularity
Theme and variable-driven styling
Real World Architectures
Admin dashboards
Data-heavy enterprise apps
Tile-based navigation web apps
Prototyping MVPs
Interactive, responsive web applications
Design Principles
Metro-inspired clean UI
Component-based development
Responsive grid and flexbox layout
Customizable themes and color schemes
Integrated JS widgets for interactivity
Scalability Guide
Include only needed components and widgets
Use theme variables for consistency
Optimize JS widget usage
Organize components efficiently
Leverage grid system for complex dashboards
Migration Guide
Metro 3 -> Metro 4: update grid and component classes
Update JS widget initialization
Adjust theme variables and colors
Ensure responsive and accessibility compliance
Refactor deprecated components