Table of contents
exhibit
Example;
click the button to change two data in vuex
index.js
import Vue from 'vue'
import Vuex from 'vuex'
Vue.use(Vuex)
export default new Vuex.Store({
state: {
orgno: "456",text: "汉字"},
mutations: {
setchang(state) {
state.orgno = "123" },
settext(state) {
state.text = "新的汉字"}
},
actions: {
},
modules: {
}
})
home.vue
<template>
<div class="main">
<el-button @click="kai">给vuex传数据</el-button>
</div>
</template>
<script>
import {
mapState } from "vuex"; //方便使用state中数据
export default {
data() {
return {
msg: [],
};
},
computed: {
...mapState(["orgno", "text"]),
},
watch: {
orgno: {
handler(nal, old) {
this.ges();
},
},
text: {
handler(nal, old) {
this.ges();
},
},
},
methods: {
ges() {
for (var i = 0; i < 8; i++) {
this.msg.push(i);
}
},
},
};
</script>
The method of listening to vuex data is executed twice
Change
<template>
<div class="main">
<el-button @click="kai">给vuex传数据</el-button>
</div>
</template>
<script>
import {
mapState } from "vuex"; //方便使用state中数据
export default {
data() {
return {
msg: [],
};
},
computed: {
...mapState(["orgno", "text"]),
change() {
const {
orgno, text } = this;
return {
orgno,
text,
};
},
},
watch: {
change: {
handler(event) {
if (event) {
this.ges();
}
},
deep: true,
},
},
methods: {
ges() {
for (var i = 0; i < 8; i++) {
this.msg.push(i);
}
},
},
};
</script>
1. Use the computed property to define a method that returns a value.
2. Listen to this method, you can
