Merge branch 'feat/unref_api' into feat/vue3_API

# Conflicts:
#	src/apis/state.ts
#	src/reactivity/index.ts
#	src/reactivity/ref.ts

Author: pikax

src/apis/state.ts

@@ -9,4 +9,5 @@ export {
   isReactive,
   UnwrapRef,
   nonReactive,
+  unref,
 } from '../reactivity';

src/reactivity/index.ts

@@ -1,3 +1,3 @@
 export { reactive, isReactive, nonReactive } from './reactive';
-export { ref, isRef, Ref, createRef, UnwrapRef, toRefs, toRef } from './ref';
+export { ref, isRef, Ref, createRef, UnwrapRef, toRefs, toRef, unref } from './ref';
 export { set } from './set';

src/reactivity/ref.ts

@@ -111,6 +111,10 @@ export function isRef<T>(value: any): value is Ref<T> {
   return value instanceof RefImpl;
 }
 
+export function unref<T>(ref: T): T extends Ref<infer V> ? V : T {
+  return isRef(ref) ? (ref.value as any) : ref;
+}
+
 export function toRefs<T extends Data = Data>(obj: T): { [K in keyof T]: Ref<T[K]> } {
   if (!isPlainObject(obj)) return obj as any;
 

test/apis/state.spec.js

@@ -1,5 +1,5 @@
 const Vue = require('vue/dist/vue.common.js');
-const { reactive, ref, watch, set, toRefs, computed } = require('../../src');
+const { reactive, ref, watch, set, toRefs, computed, unref } = require('../../src');
 
 describe('api/ref', () => {
   it('should work with array', () => {
@@ -331,6 +331,12 @@ describe('unwrapping', () => {
     expect(state.list[0].value).toBe(0);
   });
 
+  it('should unrwap ref', () => {
+    expect(unref(0)).toBe(0);
+    expect(unref(ref(0))).toBe(0);
+    expect(unref({ value: 1 })).toStrictEqual({ value: 1 });
+  });
+
   it('should now unwrap plain object when using set at Array', () => {
     const state = reactive({
       list: [],