fix(ssr): respect app.config.warnHandler during ssr

close #11830

packages/runtime-core/src/index.ts

@@ -400,6 +400,7 @@ import { renderComponentRoot } from './componentRenderUtils'
 import { setCurrentRenderingInstance } from './componentRenderContext'
 import { isVNode, normalizeVNode } from './vnode'
 import { ensureValidVNode } from './helpers/renderSlot'
+import { popWarningContext, pushWarningContext } from './warning'
 
 const _ssrUtils: {
   createComponentInstance: typeof createComponentInstance
@@ -410,6 +411,8 @@ const _ssrUtils: {
   normalizeVNode: typeof normalizeVNode
   getComponentPublicInstance: typeof getComponentPublicInstance
   ensureValidVNode: typeof ensureValidVNode
+  pushWarningContext: typeof pushWarningContext
+  popWarningContext: typeof popWarningContext
 } = {
   createComponentInstance,
   setupComponent,
@@ -419,6 +422,8 @@ const _ssrUtils: {
   normalizeVNode,
   getComponentPublicInstance,
   ensureValidVNode,
+  pushWarningContext,
+  popWarningContext,
 }
 
 /**

packages/server-renderer/__tests__/render.spec.ts

@@ -81,6 +81,18 @@ function testRender(type: string, render: typeof renderToString) {
       expect(html).toBe(`<div>foo</div>`)
     })
 
+    test('warnings should be suppressed by app.config.warnHandler', async () => {
+      const app = createApp({
+        render() {
+          return h('div', this.foo)
+        },
+      })
+      app.config.warnHandler = vi.fn()
+      await render(app)
+      expect('not defined on instance').not.toHaveBeenWarned()
+      expect(app.config.warnHandler).toHaveBeenCalledTimes(1)
+    })
+
     describe('components', () => {
       test('vnode components', async () => {
         expect(

packages/server-renderer/src/render.ts

@@ -35,6 +35,8 @@ const {
   setupComponent,
   renderComponentRoot,
   normalizeVNode,
+  pushWarningContext,
+  popWarningContext,
 } = ssrUtils
 
 export type SSRBuffer = SSRBufferItem[] & { hasAsync?: boolean }
@@ -91,8 +93,14 @@ export function renderComponentVNode(
   parentComponent: ComponentInternalInstance | null = null,
   slotScopeId?: string,
 ): SSRBuffer | Promise<SSRBuffer> {
-  const instance = createComponentInstance(vnode, parentComponent, null)
+  const instance = (vnode.component = createComponentInstance(
+    vnode,
+    parentComponent,
+    null,
+  ))
+  if (__DEV__) pushWarningContext(vnode)
   const res = setupComponent(instance, true /* isSSR */)
+  if (__DEV__) popWarningContext()
   const hasAsyncSetup = isPromise(res)
   let prefetches = instance.sp /* LifecycleHooks.SERVER_PREFETCH */
   if (hasAsyncSetup || prefetches) {
@@ -118,6 +126,7 @@ function renderComponentSubTree(
   instance: ComponentInternalInstance,
   slotScopeId?: string,
 ): SSRBuffer | Promise<SSRBuffer> {
+  if (__DEV__) pushWarningContext(instance.vnode)
   const comp = instance.type as Component
   const { getBuffer, push } = createBuffer()
   if (isFunction(comp)) {
@@ -207,6 +216,7 @@ function renderComponentSubTree(
       push(`<!---->`)
     }
   }
+  if (__DEV__) popWarningContext()
   return getBuffer()
 }