add vnode support

Author: pikax

packages/dts-test/defineComponent.test-d.tsx

@@ -320,7 +320,7 @@ describe('with object props', () => {
     props: {
       myProp: {
         type: Number,
-        validator: (val: unknown) => {
+        validator(val) {
           // @ts-expect-error
           return val !== this.otherProp
         },

packages/dts-test/h.test-d.ts

@@ -8,7 +8,8 @@ import {
   Suspense,
   Component,
   resolveComponent,
-  ConcreteComponent
+  ConcreteComponent,
+  VNode
 } from 'vue'
 import { describe, expectAssignable, expectType } from './utils'
 
@@ -254,6 +255,8 @@ describe('h should work with multiple types', () => {
   h(sampleComponent, {}, [])
 })
 
+// usage in test-utils
 describe('should allow to assign vnode', () => {
   h(h('div', 'test'))
+  h({} as unknown as VNode | string | { render: Function } | Component)
 })

packages/runtime-core/src/h.ts

@@ -180,9 +180,12 @@ export function h<P>(
 ): VNode
 
 // catch all types
-export function h(type: string | Constructor, children?: RawChildren): VNode
+export function h(
+  type: VNode | string | Constructor,
+  children?: RawChildren
+): VNode
 export function h<P>(
-  type: string | Component<P>,
+  type: VNode | string | Component<P>,
   props?: (RawProps & P) | ({} extends P ? null : never),
   children?: RawChildren | RawSlots
 ): VNode