Files

T

yeuimu 6c61a4e871 feat(deploy): production deployment setup and fixes

- Debian-based api image (bookworm-slim), docker/debian mirrors, prisma
  binaryTargets for openssl 3.0
- nginx: admin SPA under /admin, TLS via acme.sh (ZeroSSL) + auto-renewal
  cron, http->https redirect
- prisma: add origin_goods.delisted migration, sync missing schema
  (good_image/tag_font_color/good_tags), fix users.createdAt Timestamptz
- api: CORS wildcard reflection, helmet CORP cross-origin, price
  backfill in persistProductDetail, categoryIcon ancestor fallback,
  mediaByColor per-color gallery in public goods detail
- admin: /admin base path (vite + router)
- import-data.mjs: udt_name casting, serial sequence advance fix

2026-08-26 14:23:09 +08:00

3.4 KiB

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name, description

name	description
Provide / Inject	Pass data through component tree without prop drilling

Provide / Inject

Provide data from ancestor components to any descendant, avoiding prop drilling.

Basic Usage

<!-- Provider.vue -->
<script setup lang="ts">
import { provide, ref } from 'vue'

const message = ref('hello')
provide('message', message)
</script>

<!-- DeepChild.vue (any level deep) -->
<script setup lang="ts">
import { inject } from 'vue'

const message = inject('message')
</script>

Typing with InjectionKey

Use InjectionKey for type safety between provider and injector:

// keys.ts
import type { InjectionKey, Ref } from 'vue'

export const messageKey = Symbol() as InjectionKey<Ref<string>>
export const countKey = Symbol() as InjectionKey<number>

<!-- Provider.vue -->
<script setup lang="ts">
import { provide, ref } from 'vue'
import { messageKey } from './keys'

const message = ref('hello')
provide(messageKey, message)
</script>

<!-- Injector.vue -->
<script setup lang="ts">
import { inject } from 'vue'
import { messageKey } from './keys'

const message = inject(messageKey) // Ref<string> | undefined
</script>

Default Values

// Simple default
const value = inject('message', 'default value')

// Factory function (for expensive defaults)
const value = inject('key', () => new ExpensiveClass(), true)
//                                                       ^ treat as factory

App-Level Provide

Available to all components:

// main.ts
import { createApp } from 'vue'

const app = createApp(App)
app.provide('globalConfig', { theme: 'dark' })

Reactive Provide/Inject

Provide reactive values for automatic updates:

<!-- Provider.vue -->
<script setup lang="ts">
import { provide, ref } from 'vue'

const count = ref(0)
provide('count', count)
</script>

The injected value maintains reactivity connection.

Mutations Best Practice

Keep mutations in the provider, expose update functions:

<!-- Provider.vue -->
<script setup lang="ts">
import { provide, ref, readonly } from 'vue'

const location = ref('North Pole')

function updateLocation(newLocation: string) {
  location.value = newLocation
}

provide('location', {
  location: readonly(location), // Prevent direct mutation
  updateLocation
})
</script>

<!-- Injector.vue -->
<script setup lang="ts">
import { inject } from 'vue'

const { location, updateLocation } = inject('location')!
</script>

<template>
  <button @click="updateLocation('South Pole')">
    {{ location }}
  </button>
</template>

Using Symbol Keys

Recommended for libraries and large apps to avoid collisions:

// keys.ts
export const myKey = Symbol('myKey')

// provider
provide(myKey, value)

// injector
inject(myKey)

Type Helpers

// String key with explicit type
const foo = inject<string>('foo')
//    ^? string | undefined

// With default (removes undefined)
const foo = inject<string>('foo', 'default')
//    ^? string

// Force non-undefined (use when certain it's provided)
const foo = inject('foo') as string

3.4 KiB Raw Blame History