[JavaScript知识库]Pinia，Vue生态里Vuex的代替者

我们通过创建一个简单的demo,来认识下pinia .

....安装创建项目
npm init vite@latest
npm install pinia
....引用store
import { createPinia } from 'pinia' 
const pinia = createPinia()
const app =createApp(App) 
app.use(pinia)
app.mount('#app')
....创建stroe
import { defineStore} from 'pinia'
export const mainStore = defineStore('main',{
  state:()=>{
    return {}
  },
  getters:{},
  actions:{}
})
....使用stroe
import { mainStore } from "../store/index";
const store = mainStore();

setInterval(function( ) { 
    store.$patch({
        helloWorld: "helloWddorld"
    });
    store.changeState()
},1000)

vite可以创建多种程序。这里选择vue,和ts,创建好了，再安装pinia

npm install pinia

1、在项目中引入

import { createPinia } from 'pinia'

// createApp(App).mount('#app')

const pinia = createPinia()
const app =createApp(App) 
app.use(pinia)
app.mount('#app')

2、创建store/index.ts

import { defineStore} from 'pinia'

export const mainStore = defineStore('main',{
  state:()=>{
    return {}
  },
  getters:{},
  actions:{}
})

3、添加数据到Store

state:()=>{
    return {
      helloWorld:'Hello World'
    }
  },

4、添加代码到components/Test.vue

<template>
  <h2 class="">{{ store.helloWorld }}</h2>
</template>

<script lang="ts" setup>
import { mainStore } from "../store/index";
const store = mainStore();
</script>

<style lang="scss" scoped></style>

?5、 引用到app.vue里。就可了

<script setup lang="ts"> 
    import Test from './components/Test.vue'
</script>

<template>
  <test></test>
</template> 

?

?6、写个action在store里。然后直接在页面里调用。

  actions:{
    changeState(){
        this.count++
        this.helloWorld='Hello1'
    }
  }

?

<script lang="ts" setup>
import { mainStore } from "../store/index";
const store = mainStore();

setInterval(function( ) { 
    store.$patch({
        helloWorld: "helloWddorld"
    });
    store.changeState()
},1000)
</script>