fix(types): augment ref unwrap bail types in appropriate packages

Packages can now augment the ref unwrap bail types in their own `d.ts`.
Also updated the build script to auto concat any files in a package's
`types` directory to the final generated `d.ts`.

- `@vue/reactivity` should no longer require `libs: ["DOM"]` in tsconfig
- Properly bail on `VNode` and `ComponentPublicInstance` in runtime-core

packages/reactivity/src/index.ts

@@ -9,7 +9,8 @@ export {
   triggerRef,
   Ref,
   UnwrapRef,
-  ToRefs
+  ToRefs,
+  RefUnwrapBailTypes
 } from './ref'
 export {
   reactive,

packages/reactivity/src/ref.ts

@@ -139,13 +139,37 @@ export function toRef<T extends object, K extends keyof T>(
 // corner case when use narrows type
 // Ex. type RelativePath = string & { __brand: unknown }
 // RelativePath extends object -> true
-type BaseTypes = string | number | boolean | Node | Window
+type BaseTypes = string | number | boolean
+
+/**
+ * This is a special exported interface for other packages to declare
+ * additional types that should bail out for ref unwrapping. For example
+ * \@vue/runtime-dom can declare it like so in its d.ts:
+ *
+ * ``` ts
+ * declare module '@vue/reactivity' {
+ *   export interface RefUnwrapBailTypes {
+ *     runtimeDOMBailTypes: Node | Window
+ *   }
+ * }
+ * ```
+ *
+ * Note that api-extractor somehow refuses to include `decalre module`
+ * augmentations in its generated d.ts, so we have to manually append them
+ * to the final generated d.ts in our build process.
+ */
+export interface RefUnwrapBailTypes {}
 
 export type UnwrapRef<T> = T extends ComputedRef<infer V>
   ? UnwrapRefSimple<V>
   : T extends Ref<infer V> ? UnwrapRefSimple<V> : UnwrapRefSimple<T>
 
-type UnwrapRefSimple<T> = T extends Function | CollectionTypes | BaseTypes | Ref
+type UnwrapRefSimple<T> = T extends
+  | Function
+  | CollectionTypes
+  | BaseTypes
+  | Ref
+  | RefUnwrapBailTypes[keyof RefUnwrapBailTypes]
   ? T
   : T extends Array<any> ? T : T extends object ? UnwrappedObject<T> : T
 

packages/runtime-core/src/index.ts

@@ -87,6 +87,23 @@ export {
 
 // Types -----------------------------------------------------------------------
 
+import { VNode } from './vnode'
+import { ComponentInternalInstance } from './component'
+
+// Augment Ref unwrap bail types.
+// Note: if updating this, also update `types/refBail.d.ts`.
+declare module '@vue/reactivity' {
+  export interface RefUnwrapBailTypes {
+    runtimeCoreBailTypes:
+      | VNode
+      | {
+          // directly bailing on ComponentPublicInstance results in recursion
+          // so we use this as a bail hint
+          $: ComponentInternalInstance
+        }
+  }
+}
+
 export {
   ReactiveEffect,
   ReactiveEffectOptions,

packages/runtime-core/types/refBail.d.ts

@@ -0,0 +1,14 @@
+// Note: this file is auto concatenated to the end of the bundled d.ts during
+// build.
+
+declare module '@vue/reactivity' {
+  export interface RefUnwrapBailTypes {
+    runtimeCoreBailTypes:
+      | VNode
+      | {
+          // directly bailing on ComponentPublicInstance results in recursion
+          // so we use this as a bail hint
+          $: ComponentInternalInstance
+        }
+  }
+}

packages/runtime-dom/package.json

@@ -18,9 +18,6 @@
       "esm-browser",
       "cjs",
       "global"
-    ],
-    "dts": [
-      "jsx.d.ts"
     ]
   },
   "repository": {

packages/runtime-dom/src/index.ts

@@ -14,6 +14,13 @@ import { patchProp } from './patchProp'
 // Importing from the compiler, will be tree-shaken in prod
 import { isFunction, isString, isHTMLTag, isSVGTag } from '@vue/shared'
 
+declare module '@vue/reactivity' {
+  export interface RefUnwrapBailTypes {
+    // Note: if updating this, also update `types/refBail.d.ts`.
+    runtimeDOMBailTypes: Node | Window
+  }
+}
+
 const rendererOptions = {
   patchProp,
   ...nodeOps

packages/runtime-dom/types/jsx.d.ts

@@ -1,3 +1,6 @@
+// Note: this file is auto concatenated to the end of the bundled d.ts during
+// build.
+
 import { Ref, ComponentPublicInstance } from '@vue/runtime-core'
 
 // This code is based on react definition in DefinitelyTyped published under the MIT license.

packages/runtime-dom/types/refBail.d.ts

@@ -0,0 +1,8 @@
+// Note: this file is auto concatenated to the end of the bundled d.ts during
+// build.
+
+declare module '@vue/reactivity' {
+  export interface RefUnwrapBailTypes {
+    runtimeDOMBailTypes: Node | Window
+  }
+}

scripts/build.js

@@ -107,13 +107,15 @@ async function build(target) {
     })
 
     if (extractorResult.succeeded) {
-      // concat additional d.ts to rolled-up dts (mostly for JSX)
+      // concat additional d.ts to rolled-up dts
-      if (pkg.buildOptions && pkg.buildOptions.dts) {
+      const typesDir = path.resolve(pkgDir, 'types')
+      if (await fs.exists(typesDir)) {
         const dtsPath = path.resolve(pkgDir, pkg.types)
         const existing = await fs.readFile(dtsPath, 'utf-8')
+        const typeFiles = await fs.readdir(typesDir)
         const toAdd = await Promise.all(
-          pkg.buildOptions.dts.map(file => {
+          typeFiles.map(file => {
-            return fs.readFile(path.resolve(pkgDir, file), 'utf-8')
+            return fs.readFile(path.resolve(typesDir, file), 'utf-8')
           })
         )
         await fs.writeFile(dtsPath, existing + '\n' + toAdd.join('\n'))

tsconfig.json

@@ -19,13 +19,14 @@
     "rootDir": ".",
     "paths": {
       "@vue/*": ["packages/*/src"],
-      "vue": ["packages/vue/src"]
+      "vue": ["packages/vue/src"],
+      "@vue/reavitity": ["packages/reactivity/src/index.ts"]
     }
   },
   "include": [
     "packages/global.d.ts",
-    "packages/runtime-dom/jsx.d.ts",
     "packages/*/src",
+    "packages/runtime-dom/types/jsx.d.ts",
     "packages/*/__tests__",
     "test-dts"
   ]