⚡ Bolt: Optimize ReadingProgressBar with ResizeObserver#290
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Replaced the window 'resize' event listener with a 'ResizeObserver' on 'document.documentElement' in the ReadingProgressBar component. This optimization: - Reduces CPU overhead by avoiding window-level resize event firing. - Improves accuracy by correctly capturing layout shifts (e.g., dynamic content or image loading) that affect the total scrollable height. - Aligns with the browser's paint cycle more efficiently. Measured impact: More accurate progress tracking and reduced main thread execution during layout changes.
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Nice work! 😎
I didn't find anything of concern
Risk: 🟢 Low
Risk analysis
This PR replaces a window resize listener with a ResizeObserver in the ReadingProgressBar component, which is a localized optimization affecting only the accuracy and efficiency of the progress bar updates. The change is limited to a single component and does not introduce security concerns, data risks, or infrastructure changes.
Reviewed with 🤟 by Zenable
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⚡ Bolt: Optimize ReadingProgressBar with ResizeObserver
💡 What:
Replaced the window
resizelistener with aResizeObserverinsrc/components/blocks/reading-progress-bar.tsx.🎯 Why:
The window
resizeevent only fires when the browser window is resized, missing height changes caused by dynamic content injection (like lazy-loaded images or client-side rendering).ResizeObserverspecifically tracks the dimensions of the target element (document.documentElement), providing more accurate and efficient updates to the scrollable range calculation.📊 Impact:
🔬 Measurement:
Verified by observing progress bar accuracy during simulated layout shifts and resizing using a Playwright script.
♿ Accessibility:
Ensured ARIA attributes (
aria-valuenow,aria-valuetext) continue to update correctly based on the optimized calculation.PR created automatically by Jules for task 9581303584599072591 started by @administrakt0r