##### Amara Evans

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# Progress

Progress components are essential UI elements that provide visual feedback about ongoing processes, loading states, and task completion. They help users understand the current state of an operation and estimate remaining time, enhancing the overall user experience by maintaining transparency during time-consuming tasks.

### How it works

Bootstrap's progress component creates an accessible progress bar using semantic HTML attributes. The `aria-valuenow` attribute indicates current progress, while the bar's width adjusts visually (from 0% to 100%). For accessibility, `aria-valuemin` and `aria-valuemax` define the progress range, and `aria-label` provides a descriptive label for screen readers.

Real-world Progress Examples
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Real-world Progress Examples
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### Interactive Progress

Create dynamic progress bars that respond to user interactions and update in real-time. This example demonstrates how to control progress programmatically with JavaScript, including start, pause, and reset functionality.

Interactive Progress with Controls
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Interactive Progress with Controls
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### Bar sizing

### Width

Control the progress bar width using either inline styles (`style="width: X%"`) or Bootstrap's utility classes (`w-127`). The width represents the completion percentage of your process.

Width with Utility Class
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Width with Utility Class
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### Height

Customize the progress bar height by applying the `style="height"` property to the outer `progress` container. This allows you to create both subtle and prominent progress indicators.

Height Variations
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Height Variations
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### Detailed Labels & Status

Enhance progress bars with comprehensive status information, file details, time estimates, and error states. These examples show best practices for providing meaningful feedback to users during long-running operations.

Detailed Progress with File Information
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Detailed Progress with File Information
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Basic Label (Simple)
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Basic Label (Simple)
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### System Monitoring Dashboard

Use contextual colors to create meaningful system monitoring interfaces. This example demonstrates how to build a real-world system health dashboard with CPU, memory, disk, and temperature monitoring using appropriate color coding and status indicators.

System Health Monitoring
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System Health Monitoring
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### Project Management Progress

Create sophisticated project tracking interfaces using stacked progress bars. This example shows how to visualize different project phases, include tooltips for detailed information, and provide comprehensive project status with completion estimates.

Project Development Timeline
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Project Development Timeline
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### Data Processing & Operations

Use striped progress bars for ongoing operations like data processing, backups, and synchronization. The striped pattern indicates active processing and helps users understand that work is being performed, even when progress appears slow.

Background Operations Progress
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Background Operations Progress
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### Real-time Loading States

Create engaging loading experiences with animated progress bars. These examples show how to combine progress indicators with spinners, status badges, and descriptive text to create comprehensive loading states for dashboards and AI processing.

Advanced Loading States
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Advanced Loading States
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### Custom Styling & Modern Design

Create stunning progress bars with custom CSS styling, gradients, glassmorphism effects, and modern design patterns. These examples show how to extend Bootstrap's progress component with contemporary visual effects while maintaining accessibility.

Modern Custom Progress Designs
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Modern Custom Progress Designs
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### Accessibility Best Practices

Implement fully accessible progress bars with proper ARIA attributes, screen reader support, live regions, and descriptive labels. These examples demonstrate how to create progress indicators that work for all users, including those using assistive technologies.

Accessible Progress Examples
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Accessible Progress Examples
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### Developer Tips & Best Practices

#### Pro Tips for Progress Bars

- Performance: Use `transform: translateX()` instead of width changes for smoother animations
- Accessibility: Always include `aria-label`, `aria-valuenow`, and `role="progressbar"`
- UX: Provide time estimates and cancellation options for long operations
- Responsive: Test progress bars on mobile devices - consider larger touch targets for interactive elements
- States: Handle error states, network failures, and edge cases gracefully
- Animation: Use `prefers-reduced-motion` media query to respect user preferences

#### Common Pitfalls to Avoid

- Don't update progress bars too frequently (causes visual jitter)
- Avoid progress bars that move backwards unexpectedly
- Don't use progress bars for indeterminate operations without clear end times
- Never use progress bars as decoration - they should represent actual progress
- Don't forget to handle edge cases (100% completion, errors, timeouts)

#### JavaScript Integration Example

Here's a reusable progress bar class for your projects:

    class ProgressManager {
      constructor(element) {
        this.element = element;
        this.progressBar = element.querySelector('.progress-bar');
        this.statusElement = element.querySelector('[data-progress-status]');
      }

      update(percentage, status = '') {
        this.progressBar.style.width = percentage + '%';
        this.element.setAttribute('aria-valuenow', percentage);
        if (this.statusElement) this.statusElement.textContent = status;
      }

      complete(message = 'Complete!') {
        this.update(100, message);
        this.progressBar.classList.add('bg-success');
      }

      error(message = 'Error occurred') {
        this.progressBar.classList.add('bg-danger');
        if (this.statusElement) this.statusElement.textContent = message;
      }
    }

`ESC`

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