From d5adf95dda31945a227852a6527e25bd91b561c2 Mon Sep 17 00:00:00 2001
From: zhiyuanzmj <260480378@qq.com>
Date: Thu, 10 Jul 2025 09:46:41 +0800
Subject: [PATCH] feat(runtime-vapor): support functional slot in vdom
 component (#13576)

---
 .../runtime-core/src/helpers/renderSlot.ts    |  2 +-
 .../__tests__/vdomInterop.spec.ts             | 62 ++++++++++++++++++-
 packages/runtime-vapor/src/componentProps.ts  |  2 +-
 packages/runtime-vapor/src/vdomInterop.ts     |  8 +--
 4 files changed, 66 insertions(+), 8 deletions(-)

diff --git a/packages/runtime-core/src/helpers/renderSlot.ts b/packages/runtime-core/src/helpers/renderSlot.ts
index 152c5a4b81..d5feae617a 100644
--- a/packages/runtime-core/src/helpers/renderSlot.ts
+++ b/packages/runtime-core/src/helpers/renderSlot.ts
@@ -35,7 +35,7 @@ export function renderSlot(
   let slot = slots[name]
 
   // vapor slots rendered in vdom
-  if (slot && slots._vapor) {
+  if (slot && (slot as any).__vapor) {
     const ret = (openBlock(), createBlock(VaporSlot, props))
     ret.vs = { slot, fallback }
     return ret
diff --git a/packages/runtime-vapor/__tests__/vdomInterop.spec.ts b/packages/runtime-vapor/__tests__/vdomInterop.spec.ts
index 08326d4d5d..582e67dd87 100644
--- a/packages/runtime-vapor/__tests__/vdomInterop.spec.ts
+++ b/packages/runtime-vapor/__tests__/vdomInterop.spec.ts
@@ -1,4 +1,4 @@
-import { defineComponent, h } from '@vue/runtime-dom'
+import { createVNode, defineComponent, h, renderSlot } from '@vue/runtime-dom'
 import { makeInteropRender } from './_utils'
 import { createComponent, defineVaporComponent } from '../src'
 
@@ -9,7 +9,65 @@ describe('vdomInterop', () => {
 
   describe.todo('emit', () => {})
 
-  describe.todo('slots', () => {})
+  describe('slots', () => {
+    test('basic', () => {
+      const VDomChild = defineComponent({
+        setup(_, { slots }) {
+          return () => renderSlot(slots, 'default')
+        },
+      })
+
+      const VaporChild = defineVaporComponent({
+        setup() {
+          return createComponent(
+            VDomChild as any,
+            null,
+            {
+              default: () => document.createTextNode('default slot'),
+            },
+            true,
+          )
+        },
+      })
+
+      const { html } = define({
+        setup() {
+          return () => h(VaporChild as any)
+        },
+      }).render()
+
+      expect(html()).toBe('default slot')
+    })
+
+    test('functional slot', () => {
+      const VDomChild = defineComponent({
+        setup(_, { slots }) {
+          return () => createVNode(slots.default!)
+        },
+      })
+
+      const VaporChild = defineVaporComponent({
+        setup() {
+          return createComponent(
+            VDomChild as any,
+            null,
+            {
+              default: () => document.createTextNode('default slot'),
+            },
+            true,
+          )
+        },
+      })
+
+      const { html } = define({
+        setup() {
+          return () => h(VaporChild as any)
+        },
+      }).render()
+
+      expect(html()).toBe('default slot')
+    })
+  })
 
   describe.todo('provide', () => {})
 
diff --git a/packages/runtime-vapor/src/componentProps.ts b/packages/runtime-vapor/src/componentProps.ts
index 7ee99b6817..b870a21b2e 100644
--- a/packages/runtime-vapor/src/componentProps.ts
+++ b/packages/runtime-vapor/src/componentProps.ts
@@ -185,7 +185,7 @@ export function getAttrFromRawProps(rawProps: RawProps, key: string): unknown {
       source = dynamicSources[i]
       isDynamic = isFunction(source)
       source = isDynamic ? (source as Function)() : source
-      if (hasOwn(source, key)) {
+      if (source && hasOwn(source, key)) {
         const value = isDynamic ? source[key] : source[key]()
         if (merged) {
           merged.push(value)
diff --git a/packages/runtime-vapor/src/vdomInterop.ts b/packages/runtime-vapor/src/vdomInterop.ts
index e277024d73..8c1dd2cee2 100644
--- a/packages/runtime-vapor/src/vdomInterop.ts
+++ b/packages/runtime-vapor/src/vdomInterop.ts
@@ -134,11 +134,11 @@ const vaporSlotPropsProxyHandler: ProxyHandler<
 
 const vaporSlotsProxyHandler: ProxyHandler<any> = {
   get(target, key) {
-    if (key === '_vapor') {
-      return target
-    } else {
-      return target[key]
+    const slot = target[key]
+    if (isFunction(slot)) {
+      slot.__vapor = true
     }
+    return slot
   },
 }
 
-- 
2.47.2