Synchronize URL Hash with Active Section

[bae080311]

Summary

Users expect the browser's URL hash to reflect the currently visible (active) section, which is crucial for direct linking, bookmarking, and sharing specific content within a page. Implementing this synchronization will enhance navigability and user experience.

Proposed Solution

• Monitor changes in the active section status within the library's core logic.
• When a new section becomes active, update the browser's URL hash (e.g., #section-id) using history.pushState() or history.replaceState() to prevent a full page reload.
• Implement logic to read the initial URL hash on page load and automatically scroll to and activate the corresponding section if found.
• Add a configuration option to enable/disable this feature and specify the hash update strategy (e.g., push or replace).

Acceptance Criteria

• When a section becomes active, the URL hash is updated to the section's ID (e.g., #/section-id).
• Clicking a navigation link with a hash scrolls to and activates the correct section.
• Navigating directly to a URL with a section hash scrolls to and activates that section on page load.
• No full page reload occurs when the URL hash is updated due to section activation.
• An option exists to enable/disable URL hash synchronization.

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