fix(createGlobalState): 延后注册的订阅不能获取最新值

src/react/__snapshots__/createGlobalState.test.tsx.snap

@@ -0,0 +1,26 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`createGlobalState bug 延后注册的订阅不能获取最新值: 只有 parent 且值为 o 1`] = `
+<DocumentFragment>
+  <div
+    id="parent"
+  >
+    o
+  </div>
+</DocumentFragment>
+`;
+
+exports[`createGlobalState bug 延后注册的订阅不能获取最新值: 有 parent 和 child 且值都为 ok 1`] = `
+<DocumentFragment>
+  <div
+    id="parent"
+  >
+    ok
+  </div>
+  <div
+    id="child"
+  >
+    ok
+  </div>
+</DocumentFragment>
+`;

src/react/createGlobalState.test.ts → src/react/createGlobalState.test.tsx

@@ -1,5 +1,7 @@
+import React from 'react'
 import { act, renderHook } from '@testing-library/react-hooks'
 import { createGlobalState, CreateGlobalStateResult } from './createGlobalState'
+import { render } from '@testing-library/react'
 
 describe('createGlobalState', () => {
   describe('有初始值', () => {
@@ -114,4 +116,30 @@ describe('createGlobalState', () => {
         .toBe('jj')
     })
   })
+
+  describe('bug', () => {
+    test('延后注册的订阅不能获取最新值', async () => {
+      const useGlobalName = createGlobalState('o')
+
+      function Child() {
+        const [name] = useGlobalName()
+        return <div id='child'>{name}</div>
+      }
+
+      function Parent() {
+        const [name] = useGlobalName()
+        return (
+          <>
+            <div id='parent'>{name}</div>
+            {name === 'ok' && <Child />}
+          </>
+        )
+      }
+
+      const { asFragment } = render(<Parent />)
+      expect(asFragment()).toMatchSnapshot('只有 parent 且值为 o')
+      useGlobalName.setState('ok')
+      expect(asFragment()).toMatchSnapshot('有 parent 和 child 且值都为 ok')
+    })
+  })
 })

src/react/createGlobalState.ts

@@ -32,8 +32,9 @@ export function createGlobalState<S>(
       nextGlobalState = (nextGlobalState as any)(currentGlobalState)
     }
     if (nextGlobalState !== currentGlobalState) {
-      bus.emit('setGlobalState', nextGlobalState as any, currentGlobalState)
+      const prevGlobalState = currentGlobalState
       currentGlobalState = nextGlobalState as any
+      bus.emit('setGlobalState', nextGlobalState as any, prevGlobalState)
     }
   }
   const watchGlobalState: (