1/* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16import { AnyAction, Dispatch, Middleware, MiddlewareAPI } from '../core/redux' 17 18/** 19 * Middleware to log the behaviors of dispatch. 20 * 21 * @param store the created old store 22 * @returns (next: Dispatch) => (newDispatch: Dispatch), by input the old dispatch, new dispatch 23 * can be obtained. 24 */ 25export const logger: Middleware = (store: MiddlewareAPI) => (next: Dispatch<AnyAction>) => (action: AnyAction) => { 26 console.info(`logger: dispatch ${JSON.stringify(action)}, store: ${JSON.stringify(store.getState())}`) 27 const result = next(action) 28 console.info(`logger: new state ${JSON.stringify(store.getState())}`) 29 return result 30}