Bootstrap Progress Bar Extension

Enhanced progress components with circular progress and animations for Bootstrap 5.

View Live Demo

Features

This package provides:

• Standard Bootstrap Progress Bar Extension with animation
• Custom circular progress bars with animation
• Viewport-based animation triggers
• Configurable animation duration and delays
• Two configuration methods:
  • Individual data-bs-* attributes (Recommended, aligns with Bootstrap)
  • Single data-bs-config JSON attribute (Legacy)
• Multiple color variants (primary, success, info, warning, danger, etc.)
• Stroke width and size customization for circular progress
• Built-in accessibility features (ARIA, reduced motion)
• Lightweight implementation
• Support for dynamically added progress bars

Installation

npm install bootstrap-progress-extension

Include the CSS and JavaScript files in your project:

<!-- For production -->
<link href="path/to/bootstrap-progress-extension.min.css" rel="stylesheet">
<script src="path/to/bootstrap-progress-extension.min.js"></script>

<!-- For development/debugging -->
<link href="path/to/bootstrap-progress-extension.css" rel="stylesheet">
<script src="path/to/bootstrap-progress-extension.js"></script>

Usage

Progress bars are configured primarily using data attributes. You can use individual attributes (recommended) or a single JSON attribute.

Precedence: JavaScript constructor options > Individual data-bs-* attributes > data-bs-config JSON > Defaults.

Basic Progress Bar

<!-- Using individual attributes (Recommended) -->
<div class="progress" role="progressbar" aria-label="Basic example"
     aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"
     data-bs-duration="2000" data-bs-animation>
  <div class="progress-bar"></div>
</div>

<!-- Using JSON attribute -->
<div class="progress" role="progressbar" aria-label="Basic example (JSON)"
     aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"
     data-bs-config='{"duration": 2500, "animation": true}'>
  <div class="progress-bar bg-info"></div>
</div>

Circular Progress Bar

Important: For circular progress bars, include the standard .progress.circular and .progress-bar elements, along with a <div class="progress-label">...%</div> inside the .progress-bar. The script automatically injects the necessary decorative elements (.circle-background, .circle-progress). Do not include them in your source HTML.

<!-- Using individual attributes (Recommended) -->
<div class="progress circular" role="progressbar" aria-label="Circular progress"
     aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"
     data-bs-stroke-width="15" data-bs-animate-in-viewport="true" data-bs-animation>
  <div class="progress-bar bg-success">
    <div class="progress-label">75%</div>
    <!-- .circle-background and .circle-progress are added here -->
  </div>
</div>

<!-- Using JSON attribute -->
<div class="progress circular" role="progressbar" aria-label="Circular progress (JSON)"
     aria-valuenow="60" aria-valuemin="0" aria-valuemax="100"
     data-bs-config='{"strokeWidth": 10, "size": 150, "animation": true}'>
  <div class="progress-bar bg-danger">
    <div class="progress-label">60%</div>
    <!-- .circle-background and .circle-progress are added here -->
  </div>
</div>

RTL Support (Right-to-Left)

Wrap your progress bar in a container with dir="rtl". Configuration works the same way.

<div dir="rtl">
  <!-- Circular Progress in RTL (Individual Attrs) -->
  <div class="progress circular" role="progressbar" aria-label="تقدم دائري"
       aria-valuenow="65" aria-valuemin="0" aria-valuemax="100"
       data-bs-stroke-width="15" data-bs-duration="2000" data-bs-animation>
    <div class="progress-bar bg-primary">
      <div class="progress-label">٦٥٪</div>
    </div>
  </div>

  <!-- Standard Progress Bar in RTL (Individual Attrs) -->
  <div class="progress" role="progressbar" aria-label="شريط التقدم"
       aria-valuenow="70" aria-valuemin="0" aria-valuemax="100"
       data-bs-duration="1800" data-bs-animation>
    <div class="progress-bar bg-success"></div>
  </div>
</div>

Dynamic Creation

Progress bars added dynamically to the DOM after page load will be automatically initialized:

// Create a progress bar dynamically
const progressBar = document.createElement('div');
progressBar.className = 'progress';
progressBar.setAttribute('role', 'progressbar');
progressBar.setAttribute('aria-label', 'Dynamic progress');
progressBar.setAttribute('aria-valuenow', '60');
progressBar.setAttribute('aria-valuemin', '0');
progressBar.setAttribute('aria-valuemax', '100');

const bar = document.createElement('div');
bar.className = 'progress-bar bg-success';
bar.style.width = '0%';

progressBar.appendChild(bar);
// Example of setting individual attributes dynamically
progressBar.setAttribute('data-bs-animation', 'true');
progressBar.setAttribute('data-bs-duration', '1000');
document.body.appendChild(progressBar);
// No manual initialization needed - MutationObserver will detect and initialize it

Configuration Options

Configuration can be set via data attributes. Individual data-bs-* attributes are recommended.

Precedence: JavaScript constructor options > Individual data-bs-* attributes > data-bs-config JSON > Defaults.

Attribute / Option	Type	Default	Description
data-bs-stroke-width	Number	15	(Circular only) Stroke width in pixels. Corresponds to strokeWidth JS/JSON option.
data-bs-size	Number	120	(Circular only) Size in pixels. Corresponds to size JS/JSON option.
data-bs-duration	Number	1500	Animation duration in milliseconds. Corresponds to duration JS/JSON option.
data-bs-delay	Number	0	Delay before animation starts in milliseconds. Corresponds to delay JS/JSON option.
data-bs-animation	Boolean	true	Enable animation. Omit or set ="false" to disable. Corresponds to animation JS/JSON option.
data-bs-animate-in-viewport	Boolean	true	Only animate when the element enters the viewport. Set ="false" to disable. Corresponds to animateInViewport JS/JSON option.
data-bs-config	String	null	(Legacy) A JSON string containing multiple options (e.g., '{"strokeWidth": 10, "animation": true}').

Note: For boolean attributes like data-bs-animation, simply adding the attribute implies true. You only need to add ="false" to explicitly disable it.

CSS Variables

The appearance of the circular progress bars can be customized using the following CSS custom properties:

Variable	Description	Default Value	Controlled By
--circle-size	The overall width and height of the circular progress component.	120px	size config option
--circle-thickness	The thickness of the progress ring.	15px	strokeWidth config option
--arc-color	The color of the progress arc. Determined by bg-* classes.	var(--bs-progress-bar-bg)	bg-* CSS class
--progress-angle	The calculated angle (0-360deg) representing the current progress visually.	0deg	JavaScript (setValue)

Note: While --arc-color and --progress-angle are used internally, you typically control the appearance via configuration options (data-bs-size, data-bs-stroke-width) and standard Bootstrap background utility classes (bg-primary, bg-success, etc.) rather than setting these CSS variables directly.

Bootstrap Variable Usage

This extension leverages standard Bootstrap CSS variables for theming and consistency:

Bootstrap Variable	How It's Used
--bs-progress-bg	Background color for the track of standard progress bars and the inactive portion of the circular progress ring.
--bs-progress-bar-bg	Default color for the active arc of circular progress bars (used when no specific bg-* class is applied).
--bs-success	Color for the active arc when .bg-success is used on the circular progress bar.
--bs-danger	Color for the active arc when .bg-danger is used on the circular progress bar.
--bs-warning	Color for the active arc when .bg-warning is used on the circular progress bar.
--bs-info	Color for the active arc when .bg-info is used on the circular progress bar.
--bs-body-bg	Background color used for the inner cutout area of the circular progress bar (to match the page background).
--bs-body-color	Default text color for the percentage label inside circular progress bars.
--bs-dark	Text color used for the percentage label specifically when the circular progress bar has the .bg-light class.

JavaScript API

Working with progress bars programmatically:

// Create a new progress bar instance
const progressElement = document.querySelector('.progress');
const progressBar = new ProgressBar(progressElement);

// Set value without animation
progressBar.setValue(75);

// Animate to value (target percentage, optional duration)
progressBar.animate(90, 2000);

// Initialize to 0%
progressBar.initialize();

Accessibility Features

Bootstrap Progress Bar Extension are built with accessibility in mind:

• ARIA Support: All progress bars use proper ARIA attributes (role="progressbar", aria-valuenow, aria-valuemin, aria-valuemax, and aria-label)
• Reduced Motion: Automatically respects the user's prefers-reduced-motion browser setting, disabling animations for users who prefer reduced motion
• Text Labels: Circular progress bars include visible text labels showing the current progress percentage
• Color Contrast: All components maintain proper contrast ratios between background, foreground, and text elements
• RTL Support: Full support for right-to-left languages using the dir="rtl" attribute
• Responsive Design: Components adapt to different screen sizes for usability on mobile devices

Browser Compatibility

• Chrome/Edge 60+
• Firefox 60+
• Safari 12+
• iOS 12+
• Not compatible with Internet Explorer

License

MIT