Vue's KeepAlive Component Prevents State Loss When Switching Views

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Vue applications by default destroy a component's instance when it is removed from the DOM, causing local state and form data to be lost on re-render. The built-in KeepAlive component solves this by caching inactive component instances instead of unmounting them. Developers can wrap dynamic components with KeepAlive to preserve state across tab switches, multi-step forms, and dashboards. Vue provides two special lifecycle hooks, onActivated and onDeactivated, to handle logic when a cached component becomes visible or hidden. The include, exclude, and max props give developers fine-grained control over which components are cached and how many instances are held in memory at once.

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ProgrammingDEV Community ·

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