set：设置值时触发。
get：获取值时触发，与set是没有必然联系的。
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
</head>
<body>
<div id="div">
<input v-model="changeFirstNameFn">
<input v-model="changeSecondNameFn">
<br />
全名：<input id="full" v-model="fullName">
</div>
<body>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
var a=new Vue({
el:"#div",
data:{
firstName:"",
lastName:"",
fullName:""
},
computed:{
changeFirstNameFn:{
get:function(){ // get 函数，返回绑定的“姓” 的输入框的value 值
return this.firstName
},
set:function(newVal){ //set函数是当数据发生变化时调用.监听到 “姓”的变化，执行set 函数
this.firstName=newVal
this.fullName=newVal+" "+ this.lastName
}
},
changeSecondNameFn:{
get:function(){
return this.lastName},
set:function(newVal){ //set 函数是当数据发生变化时调用
this.lastName=newVal
this.fullName=this.firstName+" "+newVal
}
}
}
})
</script>
</html>tab标签页的用法
<template>
<div id="main-container" class="main-container" :class="$store.state.app.collapse?'position-collapse-left':'position-left'">
<!-- 标签页 -->
<div class="tab-container">
<el-tabs class="tabs" :class="$store.state.app.collapse?'position-collapse-left':'position-left'"
v-model="mainTabsActiveName" :closable="true" type="card"
@tab-click="selectedTabHandle" @tab-remove="removeTabHandle">
<el-dropdown class="tabs-tools" :show-timeout="0" trigger="hover">
<div style="font-size:20px;50px;"><i class="el-icon-arrow-down"></i></div>
<el-dropdown-menu slot="dropdown">
<el-dropdown-item @click.native="tabsCloseCurrentHandle">关闭当前标签</el-dropdown-item>
<el-dropdown-item @click.native="tabsCloseOtherHandle">关闭其它标签</el-dropdown-item>
<el-dropdown-item @click.native="tabsCloseAllHandle">关闭全部标签</el-dropdown-item>
<el-dropdown-item @click.native="tabsRefreshCurrentHandle">刷新当前标签</el-dropdown-item>
</el-dropdown-menu>
</el-dropdown>
<el-tab-pane v-for="item in mainTabs"
:key="item.name" :label="item.title" :name="item.name">
<span slot="label"><i :class="item.icon"></i> {{item.title}} </span>
</el-tab-pane>
</el-tabs>
</div>
<!-- 主内容区域 -->
<div class="main-content">
<keep-alive>
<transition name="fade" mode="out-in">
<router-view></router-view>
</transition>
</keep-alive>
</div>
</div>
</template>
<script>
export default {
data () {
return {
}
},
computed: {
mainTabs: {
get () { return this.$store.state.tab.mainTabs },
set (val) { this.$store.commit('updateMainTabs', val) }
},
mainTabsActiveName: {
get () { return this.$store.state.tab.mainTabsActiveName },
set (val) { this.$store.commit('updateMainTabsActiveName', val) }
}
},
methods: {
// tabs, 选中tab
selectedTabHandle (tab) {
tab = this.mainTabs.filter(item => item.name === tab.name)
if (tab.length >= 1) {
this.$router.push({ name: tab[0].name })
}
},
// tabs, 删除tab
removeTabHandle (tabName) {
this.mainTabs = this.mainTabs.filter(item => item.name !== tabName)
if (this.mainTabs.length >= 1) {
// 当前选中tab被删除
if (tabName === this.mainTabsActiveName) {
this.$router.push({ name: this.mainTabs[this.mainTabs.length - 1].name }, () => {
this.mainTabsActiveName = this.$route.name
})
}
} else {
this.$router.push("/")
}
},
// tabs, 关闭当前
tabsCloseCurrentHandle () {
this.removeTabHandle(this.mainTabsActiveName)
},
// tabs, 关闭其它
tabsCloseOtherHandle () {
this.mainTabs = this.mainTabs.filter(item => item.name === this.mainTabsActiveName)
},
// tabs, 关闭全部
tabsCloseAllHandle () {
this.mainTabs = []
this.$router.push("/")
},
// tabs, 刷新当前
tabsRefreshCurrentHandle () {
var tempTabName = this.mainTabsActiveName
this.removeTabHandle(tempTabName)
this.$nextTick(() => {
this.$router.push({ name: tempTabName })
})
}
}
}
</script>
<style scoped lang="scss">
.main-container {
padding: 0 5px 5px;
position: absolute;
top: 60px;
left: 1px;
right: 1px;
bottom: 0px;
// background: rgba(56, 5, 114, 0.5);
.tabs {
position: fixed;
top: 60px;
right: 50px;
padding-left: 0px;
padding-right: 2px;
z-index: 1020;
height: 40px;
line-height: 40px;
font-size: 14px;
background: rgb(255, 253, 255);
border-color: rgba(200, 206, 206, 0.5);
// border-left- 1px;
// border-left-style: solid;
border-bottom- 1px;
border-bottom-style: solid;
}
.tabs-tools {
position: fixed;
top: 60px;
right: 0;
z-index: 1020;
height: 40px;
// padding: 0 10px;
font-size: 14px;
line-height: 40px;
cursor: pointer;
border-color: rgba(200, 206, 206, 0.5);
border-left- 1px;
border-left-style: solid;
border-bottom- 1px;
border-bottom-style: solid;
background: rgba(255, 255, 255, 1);
}
.tabs-tools:hover {
background: rgba(200, 206, 206, 1);
}
.main-content {
position: absolute;
top: 45px;
left: 5px;
right: 5px;
bottom: 5px;
padding: 5px;
// background: rgba(209, 212, 212, 0.5);
}
}
.position-left {
left: 200px;
}
.position-collapse-left {
left: 65px;
}
</style>