场景:
在页面中点击按钮,数量增加,值是存在store中的,点击事件,值没变。
<script setup lang="ts">
import { useStore } from '@/vuex';
const store = useStore()
const onSubmit = () => {
store.dispatch("incrementAction",1);
}
let count = store.state.count
</script>
<template>
<h1 @click="onSubmit">{{ count }}</h1>
</template>
原因:store.state.count错误的取值方式,虽然可以取出,但是丧失了响应式,也就是触发increment事件时候,count的值不会变化
解决:
<script setup lang="ts">
import { useStore } from '@/vuex';
import {computed} from 'vue'
const store = useStore()
const onSubmit = () => {
store.dispatch("incrementAction",1);
}
let num = computed(() => store.state.count)
</script>
<template>
<h1 @click="onSubmit">{{ count }}</h1>
<h1>{{$store.state.count}}</h1>
</template>
或者,标签中用$store.state.count也能取得响应式的值。