fix(types): no props typings in js files

types/test/v3/define-component-test.js

@@ -0,0 +1,20 @@
+// @ts-check
+import { defineComponent } from '../../index'
+import { expectError, describe } from '../utils'
+const props = {
+  a: Number
+}
+describe('defineComponent prop types work in js', () => {
+  defineComponent({
+    props,
+    computed: {
+      test() {
+        // @ts-expect-error Invalid typecast if `this.a` is not any
+        ;/** @type import('../utils').IsAny<typeof this.a> */ (this.a)
+
+        // @ts-expect-error Unknown property
+        expectError(this.b)
+      }
+    }
+  })
+})

types/tsconfig.json

@@ -5,6 +5,7 @@
     "lib": ["dom", "esnext"],
     "types": ["node"],
     "module": "esnext",
+    "allowJs": true,
     "moduleResolution": "node",
     "jsx": "preserve",
     "strict": true,
@@ -14,5 +15,6 @@
     }
   },
   "include": ["."],
+  "files": ["./test/v3/define-component-test.js"],
   "compileOnSave": false
 }

types/v3-define-component.d.ts

@@ -139,7 +139,7 @@ export function defineComponent<
  * see `ExtractPropTypes` in './componentProps.ts'
  */
 export function defineComponent<
-  Props,
+  Props = unknown,
   RawBindings = {},
   D = {},
   C extends ComputedOptions = {},