From 4baf852a34866c3ff5bfbb1f82e1f12e1c4b11d6 Mon Sep 17 00:00:00 2001
From: Carlos Rodrigues <david-181@hotmail.com>
Date: Wed, 19 Aug 2020 15:00:48 +0100
Subject: [PATCH] types(runtime-core): make `FunctionalComponent` with emit
 string[] to be `Component` (#1879)

fix #1847
---
 packages/runtime-core/src/component.ts  |  2 +-
 test-dts/functionalComponent.test-d.tsx | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/packages/runtime-core/src/component.ts b/packages/runtime-core/src/component.ts
index ee9ae1be5..cfc1a531b 100644
--- a/packages/runtime-core/src/component.ts
+++ b/packages/runtime-core/src/component.ts
@@ -110,7 +110,7 @@ export interface ClassComponent {
   __vccOpts: ComponentOptions
 }
 
-export type Component = ComponentOptions | FunctionalComponent<any>
+export type Component = ComponentOptions | FunctionalComponent<any, any>
 
 // A type used in public APIs where a component type is expected.
 // The constructor type is an artificial type returned by defineComponent().
diff --git a/test-dts/functionalComponent.test-d.tsx b/test-dts/functionalComponent.test-d.tsx
index 6783fed61..c53c4287a 100644
--- a/test-dts/functionalComponent.test-d.tsx
+++ b/test-dts/functionalComponent.test-d.tsx
@@ -1,4 +1,9 @@
-import { FunctionalComponent, expectError, expectType } from './index'
+import {
+  FunctionalComponent,
+  expectError,
+  expectType,
+  Component
+} from './index'
 
 // simple function signature
 const Foo = (props: { foo: number }) => props.foo
@@ -51,3 +56,10 @@ expectError(<Foo />)
 expectError(<Bar foo="bar" />)
 //  @ts-expect-error
 expectError(<Foo baz="bar" />)
+
+const Baz: FunctionalComponent<{}, string[]> = (props, { emit }) => {
+  expectType<{}>(props)
+  expectType<(event: string) => void>(emit)
+}
+
+expectType<Component>(Baz)