VUEX的基本使用之加减案例
组件count
<template> <div class="count"> <h2 > 当前求和为 :{{$store.state.sum}}</h2> <select v-model.number="n"> <option :value="1">1 </option> <option :value="2">2 </option> <option :value="3">3 </option> </select> <button @click="increment">+</button> <button @click="decrement">-</button> <button @click="incrementOdd">当前求和为奇数再加</button> <button @click="incrementWate">等一等再加</button> </div> </template> <script> import {nanoid} from 'nanoid' export default { name:"Count", data() { return { n:1,//用户选择的数字 } }, methods: { increment(){ // this.$store.dispatch('jia',this.n) this.$store.commit('JIA',this.n) }, decrement(){ this.$store.commit('JIAN',this.n) }, incrementOdd(){ // if (this.Sstore.state.sum%2) { this.$store.dispatch('jiaOdd',this.n) // } }, incrementWate(){ // setTimeout(() => { this.$store.dispatch('jiaWate',this.n) // }, 500); }, }, } </script> <style scoped> button{ margin: 5px; } </style>
app
<template> <div id="app"> <Count/> </div> </template> <script> // import {nanoid} from 'nanoid' //引入school 组件 import Count from './components/Count.vue' export default { name: 'app', components: { Count }, data() { return { // foods:['豆腐','白菜','粉条','方便面'], // games:['wow','lol','dota','gta5'], // films:['教父','醉拳','叶问','霍元甲'] } }, mounted() { // console.log(this) }, } </script> <style scoped> .container{ display: flex; justify-content: space-around; } video{ width: 100% } img{ width: 100% } </style>
indexjs
//该文件用于创建vuex中的store
//引入vuex
import Vue from 'vue'
import Vuex from 'vuex'
//使用插件
Vue.use(Vuex);
//猪备actions--用于响应组件中的动作
const actions={
// jia:function (context,vaule) {
// context.commit("JIA", vaule)
// },
// jian: function (context, vaule) {
// context.commit("JIAN", vaule)
// },
jiaOdd: function (context, vaule) {
if (context.state.sum%2) {
context.commit("JIA", vaule)
}
},
jiaWate: function (context, vaule) {
setTimeout(() => {
context.commit("JIA", vaule)
}, 500);
},
}
// 准备mutations--用于操作数据(state)
const mutations = {
JIA:function (state,value) {
state.sum+=value;
},
JIAN: function (state, value) {
state.sum -= value;
},
}
//准备state--用于存储数据
const state = {
sum: 0//当前的和
}
//创建store
const store=new Vuex.Store({
actions: actions,
mutations: mutations,
state: state
});
//导出store
export default store
mainjs
//引入vue文件
import Vue from 'vue'
// 引入app文件
import App from './App'
//引入store
import store from './store/index.js'
//创建vm
new Vue({
el:"#app",
// render:h=>h(App)
store,
render(h) {
return h(App);
},
})