What is Cumulative Layout Shift?
Cumulative Layout Shift (CLS) measures how much elements on a page jump around as content loads. High CLS scores frustrate users by shifting text as they read, or causing them to click the wrong buttons.
In modern luxury web design, any visual shift breaks the sense of premium detail and polish.
Techniques for Zero CLS
- **Specify Aspect Ratios**: Always set width and height values on media blocks and dynamic containers.
- **Reserve Layout Space**: Wrap asynchronous dynamic widgets (like chatbots or cookie consent banners) in min-height containers to block out their visual space before they render.
- **Enforce Web Fonts Pre-loading**: Pre-load custom fonts in the root layout to avoid font swaps and sudden layout expansions when fonts load.