$state for cart items

$state.raw for catalog

$derived for simple total

$derived.by for complex logic

No plain let for reactive vars

No $: reactive declarations

$props() for inputs

No export let

lang=ts on script

Callback prop not dispatcher

$effect for title update

$effect.pre for scroll capture

No $: for side effects

$inspect for debugging

onclick attribute syntax

No on: directive

No event modifier syntax

Callback prop not dispatcher

$props() not export let

lang=ts on script

$props() for page data

No export let in pages

$state for search input

$derived for filtered results

onclick not on:click

PageServerLoad type

error() for missing resource

PageData type on data prop

lang=ts on scripts

No $: reactive declarations

children snippet in MetricCard

Named snippet prop for header

$state.raw for API data

$state for filter inputs

$derived for filtered metrics

Callback prop for refresh

$props() for page data

No export let anywhere

No $: reactive declarations

lang=ts on all scripts

$props() for form data

No export let

$state for live inputs

$derived for word count

$derived for excerpt

No $: declarations

oninput not on:input

fail() for validation

redirect(303) on success

use:enhance on form

role=alert on errors

$bindable() for two-way binding

$props() not export let

Callback prop not createEventDispatcher

$state() for internal state

No on: event directive

No event modifier syntax

lang=ts on all scripts

No $: reactive declarations

$derived for computed values

Parameterized snippet

Snippet type import

@render for snippet invocation

No <slot> usage

$state.raw for fetched data

$props() not export let

children or named snippet prop

No on: event directive

lang=ts on scripts

No $: reactive declarations

$effect for side effects

$effect.pre for pre-DOM work

$inspect for debugging

No $: side-effect blocks

$props() not export let

$state() for reactive vars

No on: event directive

Callback prop not createEventDispatcher

lang=ts on scripts

$derived for computed values