sveltekit-flash-message

• Purpose: The library facilitates passing temporary data (flash messages) between requests in SvelteKit, commonly used to display success/error messages after form submissions or redirects. It encourages web apps to follow the "Redirect After Post" pattern.

• Target Audience: SvelteKit developers who need to manage transient messages across page navigations, especially in form actions and endpoints.

• Key Features:

  • Server-side flash message handling with redirect and setFlash functions.
  • Client-side integration via getFlash store for displaying messages.
  • Supports toast notifications via event-style effects.
  • Configurable options like auto-clear timers (clearAfterMs) and navigation behavior (clearOnNavigate).
  • Works alongside Superforms for enhanced form handling.

• SvelteKit Support: Primarily designed for SvelteKit, with seamless integration into load functions, form actions, and endpoints. Requires minimal setup in +layout.server.ts and +layout.svelte.

• Security Note: Flash messages are transferred via cookies and should be treated as untrusted user input (avoid {@html} usage).

• Migration: Simplified APIs in v2.x (e.g., loadFlash replaces loadFlashMessage), with automatic navigation clearing.

For issues or feedback, visit the GitHub repository .