chore:add a debug example

examples/redux/index.js

@@ -0,0 +1,39 @@
+const { createStore } = require('redux')
+
+const initialState = {
+  count: 0,
+}
+
+const INCREMENT = 'INCREMENT'
+const DECREMENT = 'DECREMENT'
+
+function increment() {
+  return { type: INCREMENT }
+}
+
+function decrement() {
+  return { type: DECREMENT }
+}
+
+function counterReducer(state = initialState, action) {
+  switch (action.type) {
+    case INCREMENT:
+      return { count: state.count + 1 }
+    case DECREMENT:
+      return { count: state.count - 1 }
+    default:
+      return state
+  }
+}
+
+// 创建 store
+const store = createStore(counterReducer)
+
+// 订阅 store，当状态发生变化时执行回调函数
+store.subscribe(() => {
+  console.log('当前状态：', store.getState())
+})
+
+store.dispatch(increment()) // 当前状态： { count: 1 }
+store.dispatch(increment()) // 当前状态： { count: 2 }
+store.dispatch(decrement()) // 当前状态： { count: 1 }

examples/redux/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "redux",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+    "redux": "^5.0.1"
+  }
+}