浅谈Vuex@2.3.0 中的 state 支持函数申明

2019-11-19 14:52:49

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vuex 2.3.0 的发布说明: Modules can now declare state using a function - this allows the same module definition to be reused (e.g. multiple times in the same store, or in multiple stores)

假如你 vuex 的模块有多个格式是完全一样的, 这时候就可以把这个模块公共出来, 在 Vuex 实例里引用, 如:

import api from '~api'const actions = {  async ['get']({commit, rootState: {route: { path }}}, config = {}) {    const { data: { code, data } } = await api.post(config.url, config.data)    if (code === 1001) commit('receive', data)  }}const mutations = {  ['receive'](state, data) {    state.data = [].concat(data)  },  ['modify'](state, payload) {    const index = state.data.findIndex(item => item.id === payload.id)    if (index > -1) {      state.data.splice(index, 1, payload)    }  },  ['insert'](state, payload) {    state.data = [payload].concat(state.data)  },  ['remove'](state, id) {    const index = state.data.findIndex(item => item.id === id)    state.data.splice(index, 1)  }}const getters = {  ['get'](state) {    return state.data  }}export const _actions = actionsexport const _mutations = mutationsexport const _getters = gettersexport default {  namespaced: true,  actions,  mutations,  getters}

import Vue from 'vue'import Vuex from 'vuex'import lists from './general/lists'Vue.use(Vuex)export default new Vuex.Store({  namespaced: true,  modules: {    base: {      namespaced: true,      modules: {        app: {...lists, state: { lists: { data: [], total: 0, current_page: 1 } }},        platform: {...lists, state: { lists: { data: [], total: 0, current_page: 1 } }},        product: {          namespaced: true,          modules: {            category: {...lists, state: { lists: { data: [], total: 0, current_page: 1 } }},          }        },        keyword: {          namespaced: true,          modules: {            username: {...lists, state: { lists: { data: [], total: 0, current_page: 1 } }},          }        },      }    },    buzz: {      namespaced: true,      modules: {        shop: {...lists, state: { lists: { data: [], total: 0, current_page: 1 } }},      }    }})

但是 state 却需要每个单独设置, 如果直接设置在lists里, 会导致 state 对象被引用共享

在 vuex@2.3.0 中, 这个问题将不存在

import api from '~api'const actions = {  async ['get']({commit, rootState: {route: { path }}}, config = {}) {    const { data: { code, data } } = await api.post(config.url, config.data)    if (code === 1001) commit('receive', data)  }}const mutations = {  ['receive'](state, data) {    state.data = [].concat(data)  },  ['modify'](state, payload) {    const index = state.data.findIndex(item => item.id === payload.id)    if (index > -1) {      state.data.splice(index, 1, payload)    }  },  ['insert'](state, payload) {    state.data = [payload].concat(state.data)  },  ['remove'](state, id) {    const index = state.data.findIndex(item => item.id === id)    state.data.splice(index, 1)  }}const getters = {  ['get'](state) {    return state.data  }}export const _actions = actionsexport const _mutations = mutationsexport const _getters = gettersexport default {  namespaced: true,  state() {    return { lists: { data: [], total: 0, current_page: 1 } }  },  actions,  mutations,  getters}

import Vue from 'vue'import Vuex from 'vuex'import lists from './general/lists'Vue.use(Vuex)export default new Vuex.Store({  namespaced: true,  modules: {    base: {      namespaced: true,      modules: {        app: lists,        platform: lists,        product: {          namespaced: true,          modules: {            category: lists,          }        },        keyword: {          namespaced: true,          modules: {            username: lists,          }        },      }    },    buzz: {      namespaced: true,      modules: {        shop: lists,      }    }})

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。

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