The useDeferredValue Hook
Discover how to use React's useDeferredValue hook to maintain fast and responsive user interfaces by deferring expensive renders. Learn to optimize dynamic components like sliders and live previews to avoid UI lag even with large data updates.
Modern apps often include live previews, such as design tools, dashboards, or data visualizers, where users tweak inputs and expect immediate feedback. However, sometimes rendering these updates can become resource-intensive.
For example, imagine an app that generates a large color palette. Each time you adjust a slider or input, the app recalculates and renders hundreds of color boxes. Moving the slider quickly can make the entire interface lag or freeze for a moment.
React’s useDeferredValue Hook helps prevent that. It allows you to delay heavy computations while keeping the main interface, such as input or slider updates, fast and smooth.