provide/inject huruhusu sehemu ya wazazi kutoa data kwa mtoto yeyote, haijalishi jinsi inavyokuwa kirefu, bila kutuma props kupitia sehemu ya kati. Wao kutatua prop drilling.
App → Layout → Sidebar → Menu → MenuItem
Kama tu inayohitaji , kutuma kama prop kupitia , , na (ambayo haitumii) ni mahitaji na kelele. / kuweza kupuuza kati.
MenuItemthemeLayoutSidebarMenuprovideinject<!-- App.vue -->
<script setup>
import { provide, ref } from "vue";
const theme = ref("dark");
provide("theme", theme); // make `theme` available to ALL descendants
provide("toggleTheme", () => { // can provide functions too
theme.value = theme.value === "dark" ? "light" : "dark";
});
</script>
<!-- MenuItem.vue (deeply nested) -->
<script setup>
import { inject } from "vue";
const theme = inject("theme"); // get it directly — no props in between
const toggleTheme = inject("toggleTheme");
const color = inject("color", "blue"); // with a default fallback
</script>
// ✅ provide a ref/reactive so descendants see updates
provide("theme", theme); // theme is a ref → reactive
// ❌ provide("theme", theme.value) → passes a snapshot, not reactive
Kumtolea reactive kitu (the ref, si yake .value) ili iweze kubadilika, sehemu zote zinazojitokeza kurejea.
import { themeKey } from "./keys"; // export const themeKey = Symbol()
provide(themeKey, theme); // avoids string-key collisions
provide/inject → pass data down a specific subtree (theme, form context, a service)
Pinia → global, app-wide shared state (user, cart) usable anywhere
Tumia provide/inject kwa dependency-injection ndani ya subtree; chagua Pinia wakati hali ni ya pandikali au kusambazwa katika sehemu zisizohusiana za programu.
provide/inject kuondoa prop drilling kwa data ambayo sehemu nyingi za kina zinashiriki (mada, lugha, fomu/muktadha, huduma za plugin).
Kujua kumtolea thamani za reactive (hivyo sasisho huenea), kutumia thamani chaguomsingi/Ufunguo wa Symbol, na kutofautiana na hali ya pandikali (Pinia) hukuruhusu kusambaza muktadha unaoshirikiwa kwa njia safi kupitia miti ya kirefu ya sehemu.