Interactive Bar Chart Demonstration

This sample visualization demonstrates the core capabilities of our D3.js implementation. The chart showcases proper CSS-based styling, responsive design principles, and smooth interactive hover effects without using any inline styles.

Features Demonstrated:

  • CSS-based styling: All visual elements are styled through external CSS
  • Interactive hover effects: Bars change color when hovered
  • Responsive design: Chart adapts to different screen sizes
  • Semantic markup: Proper use of SVG elements and classes
  • Accessibility: Clear axis labels and readable fonts

Live Demonstration

Interact with the chart below by hovering over the bars:

Data Source: Sample dataset for demonstration purposes

Chart Type: Interactive Bar Chart

Technology: D3.js v7 with CSS styling

Implementation Details

This visualization serves as a foundation for more complex data visualizations in our project. The implementation follows best practices for:

Code Structure:

  • Separation of Concerns: HTML structure, CSS styling, and JavaScript logic are kept separate
  • Reusable Components: Chart components can be easily adapted for different datasets
  • Performance Optimization: Efficient D3.js data binding and minimal DOM manipulation
  • Maintainable Code: Clear commenting and modular structure

Styling Approach:

  • External CSS: All styling rules are defined in styles.css
  • CSS Classes: Semantic class names for SVG elements (.bar, .axis, .axis-label)
  • Hover Effects: CSS transitions for smooth interactions
  • Responsive Design: Flexible layouts that work on all devices