来源：read://https_www.cnblogs.com/?url=https%3A%2F%2Fwww.cnblogs.com%2Fsea-breeze%2Fp%2F11321961.html
模块开启命名空间后，享有独自的命名空间。
{
"模块1":{
state:{},
getters:{},
mutations:{},
actions:{}
},
"模块2":{
state:{},
getters:{},
mutations:{},
actions:{}
}
}
mapState、mapGetters、mapMutations、mapActions第一个参数是字符串（命名空间名称），第二个参数是数组（不需要重命名）/对象（需要重命名）。
mapXXXs('命名空间名称',['属性名1','属性名2'])
mapXXXs('命名空间名称',{
'组件中的新名称1':'Vuex中的原名称1',
'组件中的新名称2':'Vuex中的原名称2',
})
一 项目结构
二 main.js
import Vue from "vue";
import App from "./App.vue";
import router from "./router";
import store from "./store/index";
Vue.config.productionTip =false;new Vue({
router,
store,
render: h => h(App)
}).$mount("#app");
三 index.js
import Vue from "vue";
import Vuex from "vuex";
import cat from "./modules/cat";
import dog from "./modules/dog";
Vue.use(Vuex);
export defaultnew Vuex.Store({
modules: { cat, dog }
});
四 cat.js
exportdefault {
namespaced: true,
// 局部状态 state: {
name: "蓝白英短",
age: 1 },
// 局部读取 getters: {
desc: state => "宠物：" + state.name
},
// 局部变化 mutations: {
increment(state, payload) {
state.age += payload.num;
}
},
// 局部动作 actions: {
grow(context, payload) {
setTimeout(() => {
context.commit("increment", payload);
}, 1000);
}
}
};
五 dog.js
exportdefault {
namespaced: true,
// 局部状态 state: {
name: "拉布拉多",
age: 1 },
// 局部读取 getters: {
desc: state => "宠物：" + state.name
},
// 局部变化 mutations: {
increment(state, payload) {
state.age += payload.num;
}
},
// 局部动作 actions: {
grow(context, payload) {
setTimeout(() => {
context.commit("increment", payload);
}, 1000);
}
}
};
六 HelloWorld.vue
<template>
<div class="hello">
<h3>Vuex状态树</h3>
<div>{{this.$store.state}}</div>
<h3>mapState</h3>
<div>{{catName}} {{catAge}}</div>
<div>{{dogName}} {{dogAge}}</div>
<h3>mapGetters</h3>
<div>{{catDesc}}</div>
<div>{{dogDesc}}</div>
<h3>mapMutations</h3>
<button @click="catIncrement({num:1})">猫变化</button>
<button @click="dogIncrement({num:1})">狗变化</button>
<h3>mapActions</h3>
<button @click="catGrow({num:1})">猫动作</button>
<button @click="dogGrow({num:1})">狗动作</button>
</div>
</template>
<script>
import {mapState, mapGetters, mapMutations, mapActions} from 'vuex'
export default {
name: 'HelloWorld',
computed: {
...mapState('cat', {
catName: 'name',
catAge: 'age'
}),
...mapState('dog', {
dogName: 'name',
dogAge: 'age'
}),
...mapGetters('cat', {
catDesc: 'desc'
}),
...mapGetters('dog', {
dogDesc: 'desc'
})
},
methods: {
...mapMutations('cat', {catIncrement: 'increment'}),
...mapMutations('dog', {dogIncrement: 'increment'}),
...mapActions('cat', {catGrow: 'grow'}),
...mapActions('dog', {dogGrow: 'grow'})
}
}
</script>
七 运行效果
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