Expand/Collapse Widget

This is an expand/collapse widget built with HTML, CSS, and JavaScript. Click the button above to reveal or hide the content below.

The widget uses smooth transitions and animations to provide a pleasant user experience. It's fully accessible with ARIA attributes.

• Smooth expand/collapse animation
• Accessible with keyboard navigation
• Rotating chevron indicator
• Responsive design
• Easy to customize

The widget uses CSS transitions to animate the max-height property. When you click the toggle button, JavaScript adds or removes the "open" class from the details container.

The "open" class applies a max-height value large enough to accommodate the content, and the transition property smoothly animates between the states.

This widget is compatible with all modern browsers including:

• Chrome 60+
• Firefox 55+
• Safari 12+
• Edge 79+