types: use stricter HostNode typings

packages/runtime-dom/src/index.ts

@@ -1,14 +1,18 @@
-import { createRenderer, VNode, createAppAPI } from '@vue/runtime-core'
+import { createRenderer } from '@vue/runtime-core'
 import { nodeOps } from './nodeOps'
 import { patchProp } from './patchProp'
 
-export const render = createRenderer({
+const { render, createApp } = createRenderer<Node, Element>({
   patchProp,
   ...nodeOps
-}) as (vnode: VNode | null, container: HTMLElement) => void
+})
 
-export const createApp = createAppAPI(render)
+export { render, createApp }
 
 // re-export everything from core
 // h, Component, reactivity API, nextTick, flags & types
 export * from '@vue/runtime-core'
+
+export interface ComponentPublicInstance {
+  $el: Element
+}

packages/runtime-dom/src/modules/events.ts

@@ -45,7 +45,7 @@ export function patchEvent(
   name: string,
   prevValue: EventValue | null,
   nextValue: EventValue | null,
-  instance: ComponentInternalInstance | null
+  instance: ComponentInternalInstance | null = null
 ) {
   const invoker = prevValue && prevValue.invoker
   if (nextValue) {

packages/runtime-dom/src/nodeOps.ts

@@ -36,5 +36,6 @@ export const nodeOps = {
 
   nextSibling: (node: Node): Node | null => node.nextSibling,
 
-  querySelector: (selector: string): Node | null => doc.querySelector(selector)
+  querySelector: (selector: string): Element | null =>
+    doc.querySelector(selector)
 }

packages/runtime-dom/src/patchProp.ts

@@ -4,7 +4,7 @@ import { patchAttr } from './modules/attrs'
 import { patchDOMProp } from './modules/props'
 import { patchEvent } from './modules/events'
 import { isOn } from '@vue/shared'
-import { VNode } from '@vue/runtime-core'
+import { VNode, ComponentInternalInstance } from '@vue/runtime-core'
 
 export function patchProp(
   el: Element,
@@ -13,7 +13,7 @@ export function patchProp(
   prevValue: any,
   isSVG: boolean,
   prevChildren?: VNode[],
-  parentComponent?: any,
+  parentComponent?: ComponentInternalInstance,
   unmountChildren?: any
 ) {
   switch (key) {