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Learn Metro4 - 9 Code Examples & CST Typing Practice Test

Metro 4 UI is a front-end framework for building responsive, modern web applications with a clean, Windows Metro-inspired design. It provides prebuilt components, responsive grids, and integrated JavaScript widgets.

View all 9 Metro4 code examples →
Metro 4 Counter ExampleMetro 4 Navbar ExampleMetro 4 Card ExampleMetro 4 Modal ExampleMetro 4 Tabs ExampleMetro 4 Accordion ExampleMetro 4 Slideshow ExampleMetro 4 Tooltip ExampleMetro 4 Progress Bar Example

Learn METRO4 with Real Code Examples

Updated Nov 23, 2025

Explain

Metro 4 UI provides a complete front-end toolkit with responsive layouts, UI components, and interactive widgets.

It emphasizes a clean design language and fast prototyping.

Designed for developers who want a structured, ready-to-use framework with integrated JS features.

Core Features

Grid and flexbox-based responsive layout

UI components: buttons, modals, tiles, menus, forms, tables

JavaScript widgets: calendars, charts, sliders, notifications

Form validation and interactive controls

Customizable themes and color schemes

Basic Concepts Overview

Grid: `.row`, `.cell`, `.container`

Buttons: `.button`, `.primary`, `.success`

Forms: `.form`, `.input`, `.select`, `.checkbox`

Menus: `.menu`, `.app-bar`, `.tile`

Modals and interactive widgets via JS initialization

Project Structure

index.html - main markup

css/ - custom styles or overrides

js/ - Metro JS widgets and custom scripts

assets/ - images, fonts, icons

node_modules/ - npm dependencies if used

Building Workflow

Include Metro 4 UI CSS & JS via CDN or npm

Apply grid and layout classes

Add prebuilt UI components as needed

Initialize JS widgets for interactivity

Customize theme via LESS/CSS variables

Difficulty Use Cases

Beginner: basic layouts and buttons

Intermediate: forms, tiles, tables

Advanced: interactive widgets and modals

Expert: full-feature dashboards with custom themes

Community: contribute Metro plugins or templates

Comparisons

More structured and component-driven than Tailwind

Metro-style visual design differs from Semantic UI

Includes integrated JS widgets unlike minimal frameworks

Readable and modular markup

Optimized for dashboards and enterprise apps

Versioning Timeline

2015 - Metro 4 UI initial release

2016-2018 - Component and widget expansion

2019-2021 - Theme and responsive updates

2022-2025 - Minor improvements and maintenance

Continues to receive updates and community contributions

Glossary

Tile: a reusable block for navigation or content

Grid: responsive layout system

Widget: interactive JS component

Theme: colors and styling overrides

Metro style: Windows-inspired modern UI design

Installation Setup

Install via npm: `npm install metro4`

Or use CDN: `<link rel='stylesheet' href='https://cdn.jsdelivr.net/npm/metro4/css/metro-all.min.css'>`

Include JS via CDN or npm: `metro.min.js`

Optionally customize theme using Metro 4 variables

Integrate with build tools like Gulp, Webpack, or Parcel

Environment Setup

Install Node.js & npm

Install Metro 4 via npm or CDN

Setup Gulp or build tools if customizing

Include JS widgets for interactive components

Start coding with grids, tiles, and widgets

Config Files

metro4.json - configuration and theme variables

index.html - main markup

css/ - custom styles

js/ - JS widgets and custom scripts

package.json - npm dependencies

Cli Commands

npm install metro4

gulp build - compile CSS/JS

gulp watch - development mode

Optional: npm start for dev server

Custom CLI for theme building

Internationalization

Framework is language-agnostic

Form messages can be localized

RTL support via CSS

Widgets are locale-independent

Typography adapts to different languages

Accessibility

Keyboard navigation supported

ARIA roles in modals and interactive widgets

Focus management for dialogs

Screen reader-friendly defaults

Semantic HTML encouraged

Ui Styling

Buttons, forms, tiles, menus, tables

Responsive grid and flex layouts

Customizable colors and typography

Metro 4 widgets for interactivity

Accessible, structured HTML

State Management

No built-in state system

Widgets handle component-level state

Reactive frameworks handle app-level state

Class toggles via JS for modals/tiles

Focus and accessibility features integrated

Data Management

Handled via JS widgets and forms

Integration with REST APIs for dynamic content

No direct data-binding included

Forms support validation and interactive feedback

Frontend frameworks manage app-level data

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

Performance Notes

Include only required components to reduce CSS/JS size

Use minified CSS/JS for production

Optimize images and assets

Leverage browser caching

Avoid unnecessary JS widgets for performance

Security Notes

Validate forms server-side

Avoid unsafe inline JS

Keep Metro 4 updated to latest version

Audit third-party widgets

Ensure secure initialization of interactive components

Monitoring Analytics

Audit CSS & JS bundle size

Test responsiveness on devices

Check interactive widgets

Monitor accessibility compliance

Track frontend performance

Code Quality

Consistent class usage

Maintain theme variable consistency

Avoid unnecessary widget overrides

Document JS widget usage

Ensure responsive and accessible layouts

Practical Examples

Admin dashboards

Landing pages

Data management apps

Prototyping MVPs

Tile-based applications and interactive panels

Troubleshooting

Ensure proper inclusion of CSS and JS files

Check for class name correctness

Initialize JS widgets properly

Resolve conflicts with other frameworks

Ensure responsive layout classes are applied

Testing Guide

Test grid and responsive layouts

Verify JS widget initialization

Validate forms and input behavior

Check cross-browser compatibility

Ensure accessibility support

Deployment Options

CDN for CSS & JS

Self-host compiled CSS/JS

Include in static or dynamic apps

Integrate in CMS or dashboard systems

Build optimized bundles with selected components

Tools Ecosystem

Metro 4 UI Grid and layout

JS Widgets: calendar, charts, sliders

Tiles for navigation and dashboards

Theme builder for color schemes

Templates and UI kits for rapid prototyping

Integrations

React, Vue, Angular (via wrappers or custom integration)

Static sites and CMS

Node.js and build tools (Gulp, Webpack)

Prototyping dashboards and enterprise apps

Tile-based navigation for admin panels

Productivity Tips

Use grids and tiles for layout consistency

Leverage JS widgets efficiently

Create reusable components

Customize themes via variables

Optimize bundle size for production

Challenges

Build a responsive admin dashboard

Create a tile-based navigation panel

Implement modals and notifications

Customize colors and theme

Ensure accessibility and responsive design

Learning Path

Learn Metro 4 grid system

Explore UI components and tiles

Initialize JS widgets

Customize theme and variables

Build dashboards and interactive panels

Skill Improvement Plan

Week 1: Grid layouts and containers

Week 2: Buttons, forms, tables

Week 3: Tiles and menus

Week 4: JS widgets (calendar, notifications, sliders)

Week 5: Theme customization and dashboards

Interview Questions

Explain Metro 4 UI grid system.

How do JS widgets work?

Describe Tiles and their use cases.

How to customize theme and colors?

Compare Metro 4 UI with Semantic UI and Bootstrap.

Cheat Sheet

`.row` - grid row

`.cell` - grid column

`.button` - button

`.tile` - tile component

`.dialog` - modal or popup

Books

Metro 4 UI: Building Modern Web Apps

Mastering Metro 4 UI

Responsive Dashboards with Metro 4

Metro 4 UI Widgets and Components

Enterprise Web Apps with Metro 4

Tutorials

Official Metro 4 UI documentation

YouTube Metro 4 tutorials

Community blogs and demos

Code samples on GitHub

Interactive dashboard examples

Official Docs

https://metroui.org.ua

https://github.com/olton/Metro-UI-CSS

https://metroui.org.ua/components.html

Community Links

Metro 4 GitHub

StackOverflow Metro 4 tag

Reddit discussions

Official documentation forums

Twitter #Metro4UI

Community Support

Metro 4 UI GitHub

StackOverflow Metro 4 tag

Community forums

Reddit discussions on Metro UI

Official documentation and examples

Monetization

Create Metro 4 UI templates

Build dashboards for clients

Offer theme and widget customization

Consulting on Metro-style web apps

Develop reusable component libraries

Future Roadmap

Enhance JS widgets

Update themes and color schemes

Integrate with modern frameworks

Performance and accessibility improvements

Maintain Metro-inspired UI consistency

When Not To Use

Utility-first CSS preference projects

Small landing pages requiring minimal CSS

Teams requiring large community support

Projects needing highly frequent framework updates

Minimalistic static pages

Final Summary

Metro 4 UI is a component-rich front-end framework with Metro-style design.

Provides responsive grids, tiles, forms, and JS widgets.

Customizable via themes and variables.

Ideal for dashboards, enterprise apps, and interactive web applications.

Balances ready-made components with structured layouts.

Faq

Is Metro 4 UI still maintained?

Yes, actively maintained.

Can I use Metro 4 with frameworks?

Yes, custom integration with React, Vue, Angular possible.

Does it support responsive design?

Yes, via grid and flexbox layout.

Is it beginner-friendly?

Moderate - simple components are easy, widgets require learning.

Can I customize the theme?

Yes, using LESS variables or theme builder.

Code Sample Descriptions

1

Metro 4 Counter Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Counter</title>
</head>
<body class="m4-container m4-text-center m4-margin-top">
    <h2>Counter: <span id="count">0</span></h2>
    <div class="m4-btn-group">
        <button id="increment" class="m4-btn m4-primary">+</button>
        <button id="decrement" class="m4-btn m4-danger">-</button>
        <button id="reset" class="m4-btn m4-secondary">Reset</button>
    </div>
    <br>
    <button id="theme-btn" class="m4-btn m4-warning">Switch Theme</button>

    <script>
        let count = 0;
        let isDark = false;
        const countEl = document.getElementById('count');
        const body = document.body;

        document.getElementById('increment').onclick = () => { count++; countEl.textContent = count; };
        document.getElementById('decrement').onclick = () => { count--; countEl.textContent = count; };
        document.getElementById('reset').onclick = () => { count = 0; countEl.textContent = count; };
        document.getElementById('theme-btn').onclick = () => {
        isDark = !isDark;
        body.classList.toggle('m4-dark', isDark);
        body.classList.toggle('m4-light', !isDark);
        };
    </script>

    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>
</html>

Demonstrates a simple counter layout using Metro 4 classes and minimal JavaScript for interactivity.

Let’s Try →
2

Metro 4 Navbar Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Navbar</title>
</head>
<body class="m4-container m4-margin-top">
    <nav class="m4-navbar m4-shadow">
        <div class="m4-navbar-brand">Logo</div>
        <ul class="m4-navbar-menu">
        <li class="m4-active"><a href="#">Home</a></li>
        <li><a href="#">About</a></li>
        <li><a href="#">Contact</a></li>
        </ul>
    </nav>
</body>
</html>

Demonstrates a responsive navbar using Metro 4 classes.

Let’s Try →
3

Metro 4 Card Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Card</title>
</head>
<body class="m4-container m4-margin-top">
    <div class="m4-card m4-shadow">
        <div class="m4-card-header">Card Title</div>
        <div class="m4-card-content">This is a Metro 4 card example.</div>
        <div class="m4-card-footer">
        <button class="m4-btn m4-primary">Action</button>
        </div>
    </div>
</body>
</html>

Shows a card layout using Metro 4 card classes.

Let’s Try →
4

Metro 4 Modal Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Modal</title>
</head>
<body class="m4-container m4-text-center m4-margin-top">
    <button class="m4-btn m4-primary" onclick="Metro.dialog.open('#modal-example')">Open Modal</button>

    <div id="modal-example" class="m4-dialog m4-shadow" style="display:none;">
        <div class="m4-dialog-title">Modal Header</div>
        <div class="m4-dialog-content">This is a Metro 4 modal example.</div>
        <div class="m4-dialog-actions">
        <button class="m4-btn m4-default" onclick="Metro.dialog.close('#modal-example')">Close</button>
        </div>
    </div>

    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>
</html>

Demonstrates a modal popup using Metro 4 modal classes.

Let’s Try →
5

Metro 4 Tabs Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Tabs</title>
</head>
<body class="m4-container m4-margin-top">
    <ul class="m4-tabs" data-role="tabs">
        <li class="m4-active"><a href="#tab1">Tab 1</a></li>
        <li><a href="#tab2">Tab 2</a></li>
        <li><a href="#tab3">Tab 3</a></li>
    </ul>
    <div id="tab1">Content for Tab 1</div>
    <div id="tab2">Content for Tab 2</div>
    <div id="tab3">Content for Tab 3</div>

    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>
</html>

Shows a tabbed interface using Metro 4 tabs classes.

Let’s Try →
6

Metro 4 Accordion Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Accordion</title>
</head>
<body class="m4-container m4-margin-top">
    <ul class="m4-accordion" data-role="accordion">
        <li class="m4-open">
        <div class="m4-accordion-title">Section 1</div>
        <div class="m4-accordion-content">Content for section 1</div>
        </li>
        <li>
        <div class="m4-accordion-title">Section 2</div>
        <div class="m4-accordion-content">Content for section 2</div>
        </li>
    </ul>

    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>
</html>

Demonstrates an accordion component using Metro 4 classes.

Let’s Try →
7

Metro 4 Slideshow Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Slideshow</title>
</head>
<body class="m4-container m4-margin-top">
    <div class="m4-slideshow" data-role="slideshow" data-height="300" data-auto-play="true">
        <img src="https://via.placeholder.com/600x300" alt="">
        <img src="https://via.placeholder.com/600x300" alt="">
        <img src="https://via.placeholder.com/600x300" alt="">
    </div>

    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>
</html>

Shows a responsive slideshow using Metro 4 slideshow classes.

Let’s Try →
8

Metro 4 Tooltip Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Tooltip</title>
</head>
<body class="m4-container m4-text-center m4-margin-top">
    <button class="m4-btn m4-primary" data-role="hint" data-hint="I am a tooltip">Hover Me</button>

    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>
</html>

Demonstrates tooltips using Metro 4 tooltip classes.

Let’s Try →
9

Metro 4 Progress Bar Example

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.metroui.org.ua/v4/css/metro-all.min.css">
    <title>Metro 4 Progress Bar</title>
</head>
<body class="m4-container m4-margin-top">
    <div class="m4-progress" data-role="progress" data-value="50" data-max="100"></div>

    <script src="https://cdn.metroui.org.ua/v4/js/metro.min.js"></script>
</body>
</html>

Shows a simple progress bar using Metro 4 progress classes.

Let’s Try →

Frequently Asked Questions about Metro4

What is Metro4?

Metro 4 UI is a front-end framework for building responsive, modern web applications with a clean, Windows Metro-inspired design. It provides prebuilt components, responsive grids, and integrated JavaScript widgets.

What are the primary use cases for Metro4?

Corporate dashboards and web apps. Data-heavy admin panels. Prototyping web applications quickly. Design systems and reusable UI kits. Responsive web applications with rich interactivity

What are the strengths of Metro4?

Structured, visually clean Metro-style UI. Wide range of components and JS widgets. Responsive design with grid system. Customizable themes and color schemes. Good for dashboards and enterprise apps

What are the limitations of Metro4?

Smaller community compared to Bootstrap or Semantic UI. Less frequent updates. Not utility-first, more component-driven. Bundle can be heavy if unused components are included. Learning curve for custom JS widgets and Metro conventions

How can I practice Metro4 typing speed?

CodeSpeedTest offers 9+ real Metro4 code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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