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)
}).$mount("#app");
三 index.js
import Vue from "vue";
import Vuex from "vuex";
import cat from "./modules/cat";
import dog from "./modules/dog";
Vue.use(Vuex);
export default new Vuex.Store({
modules: { cat, dog }
});
四 cat.js
export default {
namespaced: true,
// 局部状态
state: {
name: "蓝白英短",
age: 1
},
// 局部读取
getters: {
desc: state => "宠物：" + state.name
},
// 局部变化
mutations: {
increment(state, payload) {
state.age += payload.num;
}
},
// 局部动作
actions: {
grow(context, payload) {
setTimeout(() => {
context.commit("increment", payload);
}, 1000);
}
}
};
五 dog.js
export default {
namespaced: true,
// 局部状态
state: {
name: "拉布拉多",
age: 1
},
// 局部读取
getters: {
desc: state => "宠物：" + state.name
},
// 局部变化
mutations: {
increment(state, payload) {
state.age += payload.num;
}
},
// 局部动作
actions: {
grow(context, payload) {
setTimeout(() => {
context.commit("increment", payload);
}, 1000);
}
}
};
六 HelloWorld.vue
<template>
<div class="hello">
<h3>Vuex状态树</h3>
<div>{{this.$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>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="scss">
</style>
七 运行效果
