Migration Service

Svelte 5 Migration

Upgrade your Svelte 4 app to Svelte 5 with confidence. I'll handle the runes migration, testing setup, and team training.

Common Migration Pain Points

$: reactive statements → $derived

export let props → $props()

<slot> → {#snippet}

createEventDispatcher → callback props

beforeUpdate/afterUpdate → $effect

I've written guides on all of these. Let me handle them for you.

Audit existing Svelte 4 codebase

Plan incremental migration strategy

Convert reactive statements to $state/$derived

Update component props to $props()

Replace slots with snippets

Migrate stores to runes where appropriate

Update event handlers to new syntax

Set up Vitest browser mode testing

Get a free assessment of your Svelte 4 codebase and migration estimate.