我正在使用Redux进行状态管理。 如何将存储重置为初始状态?
例如，假设我有两个用户帐户(u1和u2)。 想象下面的一系列事件:
用户u1登录到应用程序并做了一些事情，所以我们在存储中缓存一些数据。 用户u1退出。 用户u2无需刷新浏览器即可登录应用。
此时，缓存的数据将与u1关联，我想清理它。
当第一个用户注销时，如何将Redux存储重置为初始状态?
当前回答
丹·阿布拉莫夫的回答帮我破案了。然而，我遇到了一个案例，并不是整个州都需要清理。所以我是这样做的:
const combinedReducer = combineReducers({
// my reducers
});
const rootReducer = (state, action) => {
if (action.type === RESET_REDUX_STATE) {
// clear everything but keep the stuff we want to be preserved ..
delete state.something;
delete state.anotherThing;
}
return combinedReducer(state, action);
}
export default rootReducer;
其他回答
为了避免Redux引用初始状态的相同变量，我的建议是:
// write the default state as a function
const defaultOptionsState = () => ({
option1: '',
option2: 42,
});
const initialState = {
options: defaultOptionsState() // invoke it in your initial state
};
export default (state = initialState, action) => {
switch (action.type) {
case RESET_OPTIONS:
return {
...state,
options: defaultOptionsState() // invoke the default function to reset this part of the state
};
default:
return state;
}
};
另一种选择是:
store.dispatch({type: '@@redux/INIT'})
'@@redux/INIT'是redux自动调度的动作类型，当你创建存储时，所以假设你的reducers都有一个默认值，这将被那些捕获，并开始你的状态新鲜。不过，它可能被认为是redux的私有实现细节，所以买家要小心……
使用Redux Toolkit和/或Typescript:
const appReducer = combineReducers({
/* your app’s top-level reducers */
});
const rootReducer = (
state: ReturnType<typeof appReducer>,
action: AnyAction
) => {
/* if you are using RTK, you can import your action and use it's type property instead of the literal definition of the action */
if (action.type === logout.type) {
return appReducer(undefined, { type: undefined });
}
return appReducer(state, action);
};
这种方法非常正确:销毁任何特定状态“NAME”以忽略并保留其他状态。
const rootReducer = (state, action) => {
if (action.type === 'USER_LOGOUT') {
state.NAME = undefined
}
return appReducer(state, action)
}
只需编辑声明约简的文件
import { combineReducers } from 'redux';
import gets from '../';
const rootReducer = (state, action) => {
let asReset = action.type === 'RESET_STORE';
const reducers = combineReducers({
gets,
});
const transition = {
true() {
return reducers({}, action);
},
false() {
return reducers(state, action);
},
};
return transition[asReset] && transition[asReset]();
};
export default rootReducer;
