业务需求:
在基于vue开发SPA项目时,为了解决页面刷新后数据丢失的问题,我们一般都是将数据存储在localstorage或sessionstorage中;当数据需要全局处理统一管理时,我们也会借助于vue官方提供的vuex来进行数据的统一管理。vuex相比localstorage或sessionstorage来说,存储数据更安全些。与此同时,vuex也存在一些弊端,当页面刷新后,vuex中state存储的数据同时也会被更新,vuex中存储的数据不能持久化,需要监听处理来维持vuex存储的数据状态持久化。
为解决页面刷新后vuex中存储的数据状态不能持久化的问题,我采取的方案是借助第三方插件工具来实现vuex数据的持久化存储,来解决页面刷新后数据更新的问题。
yarn add vuex-persistedstate
// 或
npm install --save vuex-persistedstate
import Vuex from "vuex";
// 引入插件
import createPersistedState from "vuex-persistedstate";
Vue.use(Vuex);
const state = {};
const mutations = {};
const actions = {};
const store = new Vuex.Store({
state,
mutations,
actions,
/* vuex数据持久化配置 */
plugins: [
createPersistedState({
// 存储方式:localStorage、sessionStorage、cookies
storage: window.sessionStorage,
// 存储的 key 的key值
key: "store",
render(state) {
// 要存储的数据:本项目采用es6扩展运算符的方式存储了state中所有的数据
return { ...state };
}
})
]
});
export default store;
/* module.js */
export const dataStore = {
state: {
data: []
}
}
/* store.js */
import { dataStore } from ‘./module‘
const dataState = createPersistedState({
paths: [‘data‘]
});
export new Vuex.Store({
modules: {
dataStore
},
plugins: [dataState]
});
注意事项:
yarn add vuex-persist
// 或
npm install --save vuex-persist
import Vuex from "vuex";
// 引入插件
import VuexPersistence from "vuex-persist";
Vue.use(Vuex);
// 初始化
const state = {
userName:‘admin‘
};
const mutations = {};
const actions = {};
// 创建实例
const vuexPersisted = new VuexPersistence({
storage: window.sessionStorage,
render:state=>({
userName:state.userName
// 或
...state
})
});
const store = new Vuex.Store({
state,
actions,
mutations,
// 数据持久化设置
plugins:[vuexPersisted.plugins]
});
export default store;
属性值 | 数据类型 | 描述 |
---|---|---|
key | string | The key to store the state in the storage Default: ‘vuex‘ |
storage | Storage (Web API) | localStorage, sessionStorage, localforage or your custom Storage object.Must implement getItem, setItem, clear etc.Default: window.localStorage |
saveState | function(key, state[, storage]) | If not using storage, this custom function handles saving state to persistence |
restoreState | function (key[, storage]) => state | If not using storage, this custom function handles retrieving state from storage |
reducer | function (state) => object | State reducer. reduces state to only those values you want to save. By default, saves entire state |
filter | function (mutation) => boolean | Mutation filter. Look at mutation.type and return true for only those ones which you want a persistence write to be triggered for. Default returns true for all mutations |
modules | string[] | List of modules you want to persist. (Do not write your own reducer if you want to use this) |
asyncStorage | boolean | Denotes if the store uses Promises (like localforage) or not (you must set this to true when suing something like localforage) Default: false |
supportCircular | boolean | Denotes if the state has any circular references to itself (state.x === state) Default: false |
上述两种方案都可以实现vuex数据持久化存储。方案一是我在实际开发过程中用到的,方案二是在Github上看到的,综合来说,两者都可以时间最终的需求,而且都有对应的案例Demo可以参考。相比来说方案一在GitHub上的start数要高于方案二。
请结合实际情况选择符合自己的方案!
原文:https://www.cnblogs.com/zxk5211/p/14182898.html