14.pinia初始与安装

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pinia初始与安装

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pinia官网

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https://pinia.vuejs.org/
https://pinia.vuejs.org/introduction.html

pinia安装

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npm install pinia

main.ts引入pinia

import { createApp } from 'vue'
// import './style.css'
import App from './App.vue'
import router from './router/index'
// 引入element plus
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import * as ElementPlusIconsVue from '@element-plus/icons-vue'//引入pinia构造函数
import { createPinia } from 'pinia'// 实例化pinia
const pinia = createPinia()const app = createApp(App);
app.use(router).use(ElementPlus).use(pinia).mount('#app')
// createApp(App).mount('#app')
for (const [key, component] of Object.entries(ElementPlusIconsVue)) {app.component(key, component)}

使用pinia

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1. 在src下新建store
   然后store下新建test目录与menu，并建index.ts文件
   

    import { defineStore } from "pinia";// 创建store// defineStore第一个参数：唯一的，不可重复export const testStore = defineStore('testStore',{state:()=>{return{count: 0}},// 获取值getters:{getCount(state){return state.count// 获取count的值}},// 改变state的值actions:{setCount(count:number){this.count = count;}}})
   

2. HelloWorld.vue

   <template><h1>{{ count }}</h1><div>111111</div><el-button>Default</el-button><el-button icon="Edit" type="primary">编辑</el-button><el-button @click="addBtn" icon="Plus" type="success">新增</el-button><el-button type="info">Info</el-button><el-button type="warning">Warning</el-button><el-button type="danger">Danger</el-button><el-icon><Edit /></el-icon></template><script setup lang="ts">import { computed } from 'vue'import { testStore } from '@/store/test/index';// 获取storeconst  store = testStore()// 从store里面获取countconst count = computed(()=>{return store.getCount})// 改变store里面的值const addBtn = ()=>{store.setCount(++store.count)}</script><style scoped>.read-the-docs {color: #888;}</style>
   

3. 效果图
   

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