Migration rules

[mroforolhc]

I'm curious if there are any plans to create linting rules or warnings for deprecated Svelte syntax, such as export let, createEventDispatcher, or the on: directive?

[baseballyama]

We should prepare these rules!

[mroforolhc]

No problem, we already have migration guide with deprecated syntax:

1. export let / $$restProps / $$props – to suggest replacing it with $props();
2. $: – to suggest replacing it with $effect / $effect.pre / $derived;
3. on:{event} – on{event};
4. createEventDispatcher();
5. <slot />, let:{var}, slot={var}, $$slots – snippets;
6. <svelte:component>, <svelte:fragment>, <svelte:self>;
7. beforeUpdate/afterUpdate;

How can I help to prepare rules? I never wrote rules for linter...