调整了整个框架，模块化解耦

js/services/storage-service.js

@@ -0,0 +1,84 @@
+(function (global) {
+  'use strict';
+
+  /**
+   * 提供按命名空间隔离的本地存储封装
+   * 依赖 Utils.storage 作为底层驱动
+   */
+  class NamespacedStorage {
+    constructor(namespace) {
+      this.namespace = namespace;
+    }
+
+    _key(key) {
+      return `${this.namespace}:${key}`;
+    }
+
+    get(key, defaultValue = null) {
+      return Utils.storage.get(this._key(key), defaultValue);
+    }
+
+    set(key, value) {
+      return Utils.storage.set(this._key(key), value);
+    }
+
+    remove(key) {
+      return Utils.storage.remove(this._key(key));
+    }
+
+    clear() {
+      const prefix = `${this.namespace}:`;
+      const toDelete = [];
+      for (let i = 0; i < localStorage.length; i += 1) {
+        const storageKey = localStorage.key(i);
+        if (storageKey && storageKey.startsWith(prefix)) {
+          toDelete.push(storageKey);
+        }
+      }
+      toDelete.forEach((storageKey) => localStorage.removeItem(storageKey));
+    }
+  }
+
+  class StorageService {
+    constructor(globalNamespace = 'tool-engine') {
+      this.globalNamespace = globalNamespace;
+      this.cache = new Map();
+    }
+
+    /**
+     * 获取全局命名空间存储
+     */
+    global() {
+      if (!this.cache.has(this.globalNamespace)) {
+        this.cache.set(
+          this.globalNamespace,
+          new NamespacedStorage(this.globalNamespace)
+        );
+      }
+      return this.cache.get(this.globalNamespace);
+    }
+
+    /**
+     * 获取指定命名空间存储
+     */
+    namespace(namespace) {
+      if (!namespace) {
+        throw new Error('Storage namespace 不能为空');
+      }
+      if (!this.cache.has(namespace)) {
+        this.cache.set(namespace, new NamespacedStorage(namespace));
+      }
+      return this.cache.get(namespace);
+    }
+
+    /**
+     * 清除指定命名空间内容
+     */
+    clearNamespace(namespace) {
+      const store = this.namespace(namespace);
+      store.clear();
+    }
+  }
+
+  global.StorageService = StorageService;
+})(window);