feat(runtime-core): allow provide reassignment

packages/runtime-core/__tests__/apiCreateApp.spec.ts

@@ -112,6 +112,38 @@ describe('api: createApp', () => {
     expect(`App already provides property with key "bar".`).toHaveBeenWarned()
   })
 
+  test('allow provide reassignment', () => {
+    const Root = {
+      setup() {
+        provide('foo', 3)
+        return () => h('div')
+      },
+    }
+
+    const original = {}
+    const app = createApp(Root)
+
+    app.provide('foo', 1)
+    app.provide('foo', 2)
+    expect(`App already provides property with key "foo".`).toHaveBeenWarned()
+
+    app.provide('bar', 1)
+    app.provide('bar', 1)
+    expect(
+      `App already provides property with key "bar".`,
+    ).not.toHaveBeenWarned()
+
+    app.provide('foo1', original)
+    app.provide('foo1', original)
+    expect(
+      `App already provides property with key "foo1".`,
+    ).not.toHaveBeenWarned()
+
+    app.provide('bar1', original)
+    app.provide('bar1', {})
+    expect(`App already provides property with key "bar1".`).toHaveBeenWarned()
+  })
+
   test('runWithContext', () => {
     const app = createApp({
       setup() {

packages/runtime-core/src/apiCreateApp.ts

@@ -373,15 +373,24 @@ export function createAppAPI<HostElement>(
         }
       },
 
-      provide(key, value) {
-        if (__DEV__ && (key as string | symbol) in context.provides) {
+      provide(key, newVal) {
+        const oldValue = context.provides[key as string | symbol]
+        const isEqual = oldValue === newVal
+
+        if (
+          __DEV__ &&
+          (key as string | symbol) in context.provides &&
+          !isEqual
+        ) {
           warn(
             `App already provides property with key "${String(key)}". ` +
               `It will be overwritten with the new value.`,
           )
         }
 
-        context.provides[key as string | symbol] = value
+        if (!isEqual) {
+          context.provides[key as string | symbol] = newVal
+        }
 
         return app
       },