Vue笔记
1 Vue实例 （VM）
var vm = new Vue({
el:'#app', //挂载元素
//数据
data: {
title:'值',
....
dataList:[]
},
//方法
methods: {
方法名: function(){
},
...
},
//计算属性
computed: {
属性名： function(){
return 值
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>computed</title>
</head>
<body>
<div id="app">
<div>
姓：<input type="text" v-model='first_name' />
</div>
<div>
名：<input type="text" v-model='last_name' />
</div>
<!-- <p>姓名：{{ full_name() }}</p> -->
<!-- 采用计算方式的变量可以不在data中赋初值 -->
<p>姓名：{{ full_name }}</p>
</div>
</body>
<script type="text/javascript" src="js/vue.js"></script>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
first_name: '',
last_name: ''
},
// methods: {
// full_name: function () {
// return this.first_name + " " + this.last_name;
// }
// },
// 一个变量依赖于多个变量，一般对该变量采用计算处理
computed: {
full_name: function () {
return this.first_name + " " + this.last_name;
}
}
})
</script> </html>
computed
//监听属性
watch: {
属性名: function(){
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>computed</title>
</head>
<body>
<div id="app">
<div>
姓名：<input type="text" v-model='full_name' placeholder="姓与名以空格隔开" />
</div>
<p>姓：{{ first_name }}</p>
<p>名：{{ last_name }}</p>
</div>
</body>
<script type="text/javascript" src="js/vue.js"></script>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
full_name: '',
first_name: '',
last_name: ''
},
watch: {
full_name: function () {
// 监听full_name，然后拆分为姓与名
var fname = this.full_name;
var arr = fname.split(' ');
this.first_name = arr[0];
this.last_name = arr[1];
}
}
})
</script> </html>
watch
// delimiters
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>delimiters</title>
</head>
<body>
<div id="app">
{{ msg }} [[ msg ]] ${ msg }
</div>
</body>
<script type="text/javascript" src="js/vue.js"></script>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
msg: '数据'
},
// delimiters配置自定义绑定符号
// 值为拥有两个元素的数组，元素为字符串形式
delimiters: ['${', '}']
})
</script> </html>
delimiters
//钩子方法
//数据创建成功 data methods computed watch
//在这里从服务器获取数据
created: function(){
},
//vue实例 已经挂载到元素上
// dom操作 在这里
mounted: function(){
}
})
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>生命周期钩子</title>
</head>
<body>
<div id="app">
{{ msg }}
</div>
</body>
<script type="text/javascript" src="js/vue.js"></script>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
msg: '数据'
},
// 该钩子方法触发：vue实例刚被创建(只拥有内存位置),其他任何操作都未执行
// 就满足的beforeCreate钩子的触发条件，系统就会回调该方法的实现
// 用户在该触发条件情况下想去完成某些逻辑，那么就去实现该钩子
beforeCreate: function () { },
/*
// 系统内部调用
if (beforeCreate) {
beforeCreate()
}
// ...
// ...
if (created) {
created()
}
if (beforeMount) {
beforeMount()
}
// ...
*/ // 数据与事件加载完毕，el并没有进行挂载
created: function () {
// 获取想要的数据(请求后台)
// 事件的解绑或换绑或重新绑定
// 对虚拟DOM进行修改
},
// DOM树加载完毕，el渲染完毕
mounted:function () {
// 可能需要对DOM进行操作(交给模块处理)
}
})
</script> </html>
生命周期钩子
数据驱动
Vue.set() 或者 vm.$set()
vue实例 的对象
vm.$data
vm.$el
vm.$watch()
Vue.set(数组, 索引, 新值)
Vue.set(对象, 属性, 新值)
2 Vue视图 （V） 模板
2.1 插值
{{ }}
<p v-text=""></p>
<p v-once>{{}}p>
<p v-html=""></p>
防止闪烁 v-cloak
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>视图</title>
<style type="text/css">
p {
border: 1px solid #ff6700;
height: 30px;
line-height: 30px;
}
.abc {
border-color: yellowgreen;
}
[class] {
border-width: 5px;
} [v-cloak] {
display: none;
}
</style>
<script type="text/javascript" src="js/vue.js"></script>
</head>
<body>
<!-- <div id="app" v-cloak> -->
<div id="app">
<!-- v-model实现数据的双向绑定 -->
<input type="text" v-model='msg'>
<input type="text" v-model='msg'>
<p>{{ msg }}</p>
<p v-text='msg'></p>
<!-- 只赋值一次 -->
<p v-once>{{ msg }}</p>
<!-- 可以解析html语法的标签 -->
<p v-html='msg'></p> <!-- 属性的绑定：属性值有变量控制 v-bind:属性名 :属性名 -->
<!-- <p class="active"></p> -->
<!-- <p v-bind:class='active'></p> -->
<p :class='active'></p> <!-- 事件的绑定：事件值为函数名(带或不带参数列表) v-on:事件名 @事件名 -->
<p @dblclick='func'></p> </div>
</body>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
msg: '初值',
active: 'abc'
},
methods: {
func: function () {
alert('呵呵')
}
}
})
</script>
</html>
vue视图相关操作
2.2 绑定属性
v-bind:属性=值
:属性=值
v-model="" 用于表单控件 双向数据绑定
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>主要指令v-bind</title>
<script type="text/javascript" src="js/vue.js"></script>
<style type="text/css">
.a {
background-color: red;
}
.b {
color: green;
}
</style>
</head>
<body>
<div id="app">
<!-- v-bind:绑定系统预定义属性 -->
<!-- 字符串abc -->
<p title="abc">p段落</p>
<!-- 1、变量abc，需要初始化 -->
<p v-bind:title="abc">p段落</p>
<!-- 2、如何直接将abc作为字符串绑定到属性 -->
<p v-bind:title="'abc'">p段落</p>
<!-- 3、v-bind简写为: -->
<p :title="'ABC'">p段落</p> <!-- 4、绑定多个变量 --> <!-- i：以数组形式进行赋值 -->
<!-- a, b为两个变量 -->
<!-- 变量值可以有data提供 -->
<!-- <div :class="[a, b]">12345</div> --> <!-- ii：以对象形式进行赋值 -->
<!-- a，b为两个class值 -->
<!-- class值只取true | false -->
<!-- 非空均视为true，否则视为false -->
<!-- <div :class="{a: 'A', b: 'B'}">67890</div> -->
<!-- <div :class="{a: true, b: true}">67890</div> --> <!-- iii -->
<div :class="[{a: true}, {b: true}]">呵呵嘻嘻哈哈</div> <!-- 总结 -->
<!-- [], 中出现的值，作为变量，变量值来源于data，且最终将来源于data的数据作为属性值赋值给v-bind绑定的属性 -->
<!-- {}, 中出现的键(key)，直接作为v-bind绑定的属性的值，而键(key)对应的值(value)是决定键是否起效，值(value)的取值只为true|false --> <a :style="color" href="">百度</a>
<a :style="{color: 'red', backgroundColor: 'black'}" href="">京东</a>
</div>
</body>
<script type="text/javascript">
new Vue({
el: '#app',
data: {
abc: 'ABC',
a: 'a',
b: 'b',
// color: 'color: red'
color: {
color: 'red',
// 支持驼峰命名法
backgroundColor: 'orange'
}
}
})
</script>
</html>
vue指令之v-bind
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>主要指令v-model</title>
<script type="text/javascript" src="js/vue.js"></script>
<style type="text/css"> </style>
</head>
<body>
<div id="app">
<!-- v-model针对于表单元素 --> <form action="" method="get">
<!-- 1、双向绑定：服务于文本输入框 -->
<!-- v-model存储的值为输入框的value值 -->
<div>
<input type="text" name="usr" v-model="in_val">
<input type="password" name="ps" v-model="in_val" >
<textarea name="info" v-model="in_val"></textarea>
</div> <!-- 2、单选框 -->
<div>
<!-- 单选框是以name进行分组，同组中只能发生单选 -->
<!-- v-model存储的值为单选框的value值 -->
男：<input type="radio" name="sex" value="男" v-model="ra_val">
女：<input type="radio" name="sex" value="女" v-model="ra_val">
{{ ra_val }}
</div> <!-- 3、单一复选框 -->
<!-- v-model存储的值为true|false -->
<!-- 或者为自定义替换的值 -->
<div>
<input type="checkbox" v-model='sin_val' true-value="选中" false-value="未选中" />
{{ sin_val }}
</div> <!-- 4、多复选框 -->
<!-- v-model存储的值为存储值多复选框value的数组 -->
<div>
<input type="checkbox" value="喜好男的" name="cless" v-model='more_val' />
<input type="checkbox" value="喜好女的" name="cless" v-model='more_val' />
<input type="checkbox" value="不挑" name="cless" v-model='more_val' />
{{ more_val }}
</div> <input type="submit">
</form> </div>
</body>
<script type="text/javascript">
new Vue({
el: '#app',
data: {
in_val: '',
// 默认值可以决定单选框默认选项
ra_val: '男',
// 默认值为true，单一复选框为选中，反之false为不选中
sin_val: '',
// 数组中存在的值对应的复选框默认为选中状态
more_val: ['喜好女的','不挑']
}
})
</script>
</html>
vue指令之v-model
2.3 指令
v-bind
v-on
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>主要指令v-on</title>
<script type="text/javascript" src="js/vue.js"></script>
<style type="text/css"> </style>
</head>
<body>
<div id="app">
<!-- 1、绑定系统预定义事件，事件值为函数 -->
<div v-on:click="fn1">{{ msg }}</div>
<!-- 2、v-on简写 -->
<div @click="fn2">{{ msg }}</div>
<!-- 3、传值 -- 默认传值 -- 事件 event -->
<div @click='fn3'>{{ msg }}</div>
<!-- 4、传值 -- 自定义值 -->
<div @click="fn4(msg, 88888)">{{ msg }}</div>
<!-- 5、传参 -- 自定义值 + 事件 -->
<div @click="fn5($event, msg)">{{ msg }}</div>
</div>
</body>
<script type="text/javascript">
new Vue({
el: '#app',
data: {
msg: '默认值'
},
methods: {
fn1: function () {
alert('呵呵')
},
fn2 () {
alert('嘻嘻')
},
fn3 (obj) {
console.log(obj)
},
fn4 (obj, num) {
console.log(obj, num)
console.log(this.msg)
},
fn5 (ev, msg) {
console.log(ev, msg)
}
}
})
</script>
</html>
vue指令之v-on
v-cloak
v-for
v-if
v-else
v-else-if
v-show
v-text
v-html
v-once
v-model
v-pre
2.4 条件渲染
v-if="表达式" 表达式的返回值是boolean
v-else
v-else-if
提高效率： 使用 key="唯一值" v-bind:key=""
v-show="布尔值"
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>条件渲染</title>
<script type="text/javascript" src="js/vue.js"></script>
<style type="text/css">
.box {
width: 200px;
height: 200px;
background-color: red;
border-radius: 50%;
}
.bb {
width: 50px;
height: 50px;
border: 1px solid black;
border-radius: 50%;
font: 400 20px/50px 'STSong';
text-align: center;
user-select: none;
float: left;
margin-left: 20px;
}
.wrap:after {
content: '';
display: block;
clear: both;
}
.a {
width: 300px;
height: 200px;
}
.r {background: red}
.g {background: green}
.b {background: blue}
</style>
</head>
<body>
<div id="app">
<button @click="btnClick">切换</button>
<!-- 1、v-if取值为true|false -->
<!-- true将会被渲染|false不会被渲染(页面中不存在该标签) -->
<!-- <div class="box" v-if="isShow"></div> --> <!-- 2、v-show取值为true|false -->
<!-- true为渲染并显示，false虽然渲染到DOM上，但display以none形式存在 -->
<div class="box" v-show='false'></div> <!-- 3、v-if、v-else-if、v-else -->
<!-- 多分支条件 -->
<div class="wrap">
<!-- .bb.b$*3 -->
<div class="bb b1" @click='changeColor(0)'>红</div>
<div class="bb b2" @click='changeColor(1)'>绿</div>
<div class="bb b3" @click='changeColor(2)'>蓝</div>
</div>
<div>
<!-- 多分支一定存在判断，判断便会产生比较变量 -->
<div class="r a" v-if='tag == 0'></div>
<div class="g a" v-else-if='tag == 1'></div>
<div class="b a" v-else></div>
</div>
</div>
</body>
<script type="text/javascript">
new Vue({
el: '#app',
data: {
isShow: false,
tag: 0
},
methods: {
// 通过方法控制绑定给v-if的值
btnClick: function () {
this.isShow = !this.isShow;
},
changeColor (num) {
this.tag = num;
}
}
})
</script>
</html>
条件渲染
2.5 v-for 列表渲染
v-for 通常都需要指定 key 保证唯一值
<p v-for="item in itemList">
<p v-for="(item,index) in itemList">
<p v-for="(val,key) in obj">
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>列表渲染</title>
<script type="text/javascript" src="js/vue.js"></script>
</head>
<body>
<div id="app">
<ul>
<li>{{list[0]}}</li>
<li>{{list[1]}}</li>
<li>{{list[2]}}</li>
<li>{{list[3]}}</li>
<li>{{list[4]}}</li>
<li>{{list[5]}}</li>
<li>{{list[6]}}</li>
</ul>
<!-- 迭代数组 -->
<ul>
<!-- 变量it为集合list中被迭代出的元素 -->
<!-- 由v-for指令控制的标签会随元素的个数动态渲染 -->
<li v-for='it in list'>{{ it }}</li>
</ul> <!-- 迭代对象 -->
<div v-for='value in dic'>{{ value }}</div> <!-- 迭代除取值外的其他可迭代到的值 -->
<ul>
<li v-for="(v, i) in list">索引：{{i}} 名字：{{v}}</li>
</ul> <ul>
<li v-for="(v, k, i) in dic">{{i}} {{k}} {{v}}</li>
</ul>
</div>
</body>
<script type="text/javascript">
new Vue({
el: '#app',
data: {
list: ["张三", "李四", "王五", "赵六", "钱七", "egon", "monkey"],
dic: {'name': 'zero', 'age': 8, 'salary': 88888}
}
})
</script>
</html>
列表渲染
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>列表渲染</title>
<script type="text/javascript" src="js/vue.js"></script>
</head>
<body>
<!-- key属性：可以提高效率（通过不同的唯一key值建立缓存） -->
<div id="app">
<div v-for='(item,index) in list' :key='index' style="height: 30px">
<div v-for='(value, key, index) in item' :key='index + 10' style="float: left;">
{{key}} : {{value}}
</div>
</div>
</div>
</body>
<script type="text/javascript">
new Vue({
el: '#app',
data: {
list: [
{'name': 'egon', 'age': 108},
{'name': 'monkey', 'age': 77},
{'name': 'zero', 'age': 8}
]
}
})
// items: [{'name': '张三'}, {'age': 18}, {'sex': '男'}]
// 通过[索引]取出数组中对应的值
// 通过.key取出对象中对应的值
</script>
</html>
复杂数据的列表表达式
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>todoList</title>
<script type="text/javascript" src="js/vue.js"></script>
</head>
<body>
<!-- 录入用户输入的数据，更新到指定的list中，通过vue的数据驱动特效，实时渲染到页面 -->
<div id="app">
<div>
<input type="text" v-model='value'>
<!-- 提交：将数据添加到list中 -->
<button @click='pushAction'>提交</button>
</div>
<ul>
<!-- 点击指定的li，将自身数据从list中移除，完成自身删除 -->
<li @click='deleteAction(index)' v-for='(item,index) in list' :key="index">{{ item }}</li>
</ul> </div>
</body>
<script type="text/javascript">
new Vue({
el: '#app',
// vue目前不支持索引直接操作数据，但可以通过数据类型对应的操作方法
data: {
value: '',
list: []
},
methods: {
pushAction () {
this.list.push(this.value);
this.value = ''
},
deleteAction (index) {
// alert(index)
this.list.splice(index, 1)
}
}
})
</script>
</html>
todoList
2.6 样式绑定
class绑定
<p :class="对象">
<p :class="数组">
<p :class="{类名:true/false, 类名:true/false}">
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>选项卡 tabs</title>
<link rel="stylesheet" href="../dist/css/bootstrap.css">
<style>
#app {
margin:100px auto 0px;
width:800px;
}
.panel {
border-top:none;
}
</style>
</head>
<body> <div id="app">
<div class="row">
<div class="col-md-12">
<ul class="nav nav-tabs">
<li :class="{active: tab == 0}" @click="tab = 0"><a href="#">未付款订单</a></li>
<li :class="{active: tab == 1}" @click="tab = 1"><a href="#">未发货订单</a></li>
<li :class="{active: tab == 2}" @click="tab = 2"><a href="#">未收货订单</a></li>
<li :class="{active: tab == 3}" @click="tab = 3"><a href="#">未评价订单</a></li>
<li :class="{active: tab == 4}" @click="tab = 4"><a href="#">所有订单</a></li>
</ul> <div class="panel panel-default" v-show="tab === 0">
<div class="panel-body">
这是未付款的订单
</div>
</div> <div class="panel panel-default" v-show="tab === 1">
<div class="panel-body">
这是未发货的订单
</div>
</div> <div class="panel panel-default" v-show="tab === 2">
<div class="panel-body">
这是未收货的订单
</div>
</div> <div class="panel panel-default" v-show="tab === 3">
<div class="panel-body">
这是未评价的订单
</div>
</div> <div class="panel panel-default" v-show="tab === 4">
<div class="panel-body">
这是所有的订单
</div>
</div>
</div>
</div> </div> <script src="../dist/js/vue.js"></script>
<script>
let vm = new Vue({
el:'#app',
data: {
tab: 0
}
})
</script>
</body>
</html>
vue选项卡1
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>选项卡 tabs</title>
<link rel="stylesheet" href="../dist/css/bootstrap.css">
<style>
#app {
margin:100px auto 0px;
width:800px;
}
.panel {
border-top:none;
}
</style>
</head>
<body> <div id="app">
<div class="row">
<div class="col-md-12">
<ul class="nav nav-tabs">
<li :class="{active: isTab(0)}" @click="setTab(0)"><a href="javascript:void(0)">未付款订单</a></li>
<li :class="{active: isTab(1)}" @click="setTab(1)"><a href="javascript:void(0)">未发货订单</a></li>
<li :class="{active: isTab(2)}" @click="setTab(2)"><a href="javascript:void(0)">未收货订单</a></li>
<li :class="{active: isTab(3)}" @click="setTab(3)"><a href="javascript:void(0)">未评价订单</a></li>
<li :class="{active: isTab(4)}" @click="setTab(4)"><a href="javascript:void(0)">所有订单</a></li>
</ul> <div class="panel panel-default" v-show="isTab(0)">
<div class="panel-body">
这是未付款的订单
</div>
</div> <div class="panel panel-default" v-show="isTab(1)">
<div class="panel-body">
这是未发货的订单
</div>
</div> <div class="panel panel-default" v-show="isTab(2)">
<div class="panel-body">
这是未收货的订单
</div>
</div> <div class="panel panel-default" v-show="isTab(3)">
<div class="panel-body">
这是未评价的订单
</div>
</div> <div class="panel panel-default" v-show="isTab(4)">
<div class="panel-body">
这是所有的订单
</div>
</div>
</div>
</div> </div> <script src="../dist/js/vue.js"></script>
<script>
let vm = new Vue({
el:'#app',
data: {
tab: 0
},
methods: {
setTab(index) {
this.tab = index;
},
isTab(index) {
return this.tab === index;
}
}
})
</script>
</body>
</html>
vue选项卡2
style绑定
<p :style="{color:'值', background:'值'}">
<p :style="[{}, {}, {}]">
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Vue样式操作</title>
<style>
.item {
width: 600px;
padding: 10px;
border: 1px solid #ccc;
}
.current {
border-color:red;
}
.active {
border-color:green;
}
</style>
</head>
<body>
<div id="app">
<h1>样式操作</h1>
<hr> <p class="item" :class="cname"> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sapiente alias autem a velit neque dolore blanditiis cumque enim provident, expedita, non debitis, fugiat atque at doloribus distinctio vero repellendus maxime.</p> <p class="item" :class="{current:isCurrent, active:true, link:true, 'li-item':true}"> Lorem ipsum dolor sit amet, consectetur adipisicing elit. Sapiente alias autem a velit neque dolore blanditiis cumque enim provident, expedita, non debitis, fugiat atque at doloribus distinctio vero repellendus maxime.</p> <p :class="classObj">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dolor provident officia facilis ipsam nisi doloribus earum ratione dolorem, minus, suscipit, magnam beatae. Magni dolor similique, a molestias neque officiis animi?</p> <p :class="classList">Lorem ipsum dolor sit amet.</p>
</div> <script src="../dist/js/vue.js"></script>
<script>
new Vue({
el:'#app',
data: {
cname:'current',
isCurrent: false,
classObj: {item:true, link:true,active:true},
classList: ['link', 'item']
}
});
</script>
</body>
</html>
vue样式操作
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Vue Style绑定</title>
<style>
p {
border:1px solid #ccc;
width: 700px;
padding:20px;
}
</style>
</head>
<body>
<div id="app">
<h1>Style绑定</h1> <p :style="styleValue">Lorem ipsum dolor sit amet.</p>
<p :style="{color:'purple', background:'pink'}">Lorem ipsum dolor sit amet.</p>
<p :style="styleObj">Lorem ipsum dolor sit amet.</p>
<p :style="[styleObj, {borderWidth:'2px'}]">Lorem ipsum dolor sit amet.</p>
</div> <script src="../dist/js/vue.js"></script>
<script>
new Vue({
el:'#app',
data: {
styleValue: 'color:red;background:green',
styleObj: {color:'pink',background:'#ccc', transform:'translate(0, 0)'}
}
});
</script>
</body>
</html>
vue样式绑定-style
2.7 事件
事件绑定
<p @事件名="方法">
<p v-on:事件名="方法">
方法加 () 的问题
<p @事件名="方法(1,1,2,3,$event)">
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Vue 事件</title>
<link rel="stylesheet" href="../dist/css/bootstrap.css">
</head>
<body>
<div id="app" class="container">
<div class="page-header">
<h1>Vue 事件</h1>
</div> <div class="row">
<div class="col-md-12">
<button @click="counter ++" class="btn btn-default"> +1 </button>
<button @click="addCounter(1)" class="btn btn-default"> +1 </button>
<button @click="addCounter(10)" class="btn btn-default"> +10 </button> <hr> <p class="info">
{{counter}}
</p> <hr> <div class="alert alert-info" @mousemove="onMoveFn">
Lorem ipsum dolor sit amet.
</div> <div class="alert alert-danger" @mousemove="onMoveFn($event, 100)">
Lorem ipsum dolor sit amet.
</div>
</div>
</div>
</div> <script src="../dist/js/vue.js"></script>
<script>
new Vue({
el:'#app',
data: {
counter:0
},
methods: {
addCounter(num=1) {
this.counter += num;
}, onMoveFn(ev, num) {
console.log(ev.target)
//ev 是获取的event 对象
console.log(ev.pageX, ev.pageY)
}
}
})
</script>
</body>
</html>
vue事件绑定
事件修饰符
.stop 阻止事件冒泡
.prevent 阻止默认动作
.capture 捕获阶段触发事件
.once 只绑定一次
.self 只有本身才触发
.passive 优化移动端的scroll事件
<p @click.stop="">
<p @click.stop.prevent="">
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Vue 事件</title>
<link rel="stylesheet" href="../dist/css/bootstrap.css">
<style>
.box {
width:200px;
height:200px;
border:1px solid red;
}
.inner {
width:100px;
height:100px;
margin:50px;
background: pink
}
</style>
</head>
<body>
<div id="app" class="container">
<div class="page-header">
<h1>Vue 事件修饰符 键盘修饰符</h1>
</div> <div class="row">
<div class="col-md-12">
<div class="box" @click.self="boxFn">
<div class="inner" @click="innerFn"></div>
</div>
</div>
</div> <hr> <div class="row">
<div class="col-md-6"> <input type="text" class="form-control" @keyup.65="onkeyupFn">
<input type="text" class="form-control" @keyup.enter="onkeyupFn">
<input type="text" class="form-control" @keyup.ctrl.65="onkeyupFn"> </div>
</div>
</div> <script src="../dist/js/vue.js"></script>
<script>
new Vue({
el:'#app',
methods: {
boxFn(){
console.log('box');
},
innerFn(){
console.log('inner');
//event.stopPropagation();
},
onkeyupFn(event) {
console.log('按了 '+event.keyCode+' 按键')
}
}
})
</script>
</body>
</html>
vue事件修饰符
键盘修饰符
.enter
.space
.tab
.up
.left
.right
.down
.delete
.数字 (ascii )
系统按键修饰符
.ctrl
.alt
.shift
.meta
<input @keyup.ctrl.enter> 按住ctrl再按回车
2.8 表单
文本
input:text textarea v-model
checkbox 单个 true-value false-value
true/false
checkbox 多个
数组
单选按钮 input:redio v-model value值
select选择框 option的value值 多选 multiple, 数组
<input v-model="formData.username">
<input v-model="formData.pwd">
v-model.trim
v-model.number 把值转为 number 类型
v-model.lazy
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表单数据绑定</title>
<style>
p {
border: 1px solid #ccc;
width: 600px;
padding: 20px;
}
</style>
</head>
<body>
<div id="app">
<h1>表单数据绑定</h1>
<hr> <input type="text" v-model="message">
<br>
<textarea name="" id="" cols="30" rows="10" v-model="message"></textarea>
<br>
<h3>单个复选框</h3>
<input type="checkbox" v-model="checkVal01" true-value="yes" false-value="no">全选
<br> <h3>多个复选框</h3>
<input type="checkbox" value="lanball" v-model="loveList">篮球
<input type="checkbox" value="zuball" v-model="loveList">足球
<input type="checkbox" value="bangball" v-model="loveList">棒球
<input type="checkbox" value="paiball" v-model="loveList">排球 <h3>单选按钮</h3>
<input type="radio" v-model="sex" value="male"> 男
<input type="radio" v-model="sex" value="female"> 女 <h3>选择框</h3>
<select v-model="address">
<option value="上海">上海</option>
<option value="北京">北京</option>
<option value="深圳">深圳</option>
<option value="广州">广州</option>
</select> <h3>修饰符</h3>
<input type="text" v-model.number.lazy="num"> <p> {{num}} </p>
<p> {{address}} </p>
<p> {{sex}} </p>
<p> {{loveList}} </p>
<p>{{checkVal01}}</p>
<p>{{ message }}</p>
<p>{{ message }}</p> </div> <script src="../dist/js/vue.js"></script>
<script>
let vm = new Vue({
el: '#app',
data:{
message:'同志',
checkVal01: true,
loveList:['bangball'],
sex:'male',
address:'广州',
num:0
}
})
</script>
</body>
</html>
vue表单数据绑定
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表单</title>
<link rel="stylesheet" href="../dist/css/bootstrap.css">
<style> </style>
</head>
<body> <div id="app">
<div class="container">
<div class="page-header">
<h1>表单提交</h1>
</div> <div class="row">
<div class="col-md-6">
<form @submit.prevent="">
<div class="form-group">
<label for="#">用户名</label>
<input type="text" class="form-control" v-model="loginData.username" placeholder="请输入用户名">
</div> <div class="form-group">
<label for="#">密码</label>
<input type="password" class="form-control" v-model="loginData.pwd">
</div> <div class="checkbox">
<label for="#">
<input type="checkbox" v-model="loginData.remember"> 记住密码
</label>
</div> <button class="btn btn-success btn-block" @click="login()">登 录</button>
</form>
</div>
</div>
</div>
</div> <script src="../dist/js/vue.js"></script>
<script>
let vm = new Vue({
el:'#app',
data: {
loginData: {
username:'',
pwd:'',
remember: true
}
},
methods: {
login() {
//获取所有表单的值
console.log(this.loginData)
}
}
})
</script>
</body>
</html>
vue获取表单数据
实例：todolist
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>todoList</title>
<style>
#app {
margin:100px auto 0;
width:600px;
}
.input-box {
font-size:0;
}
.input-box input {
box-sizing: border-box;
width:500px;
font-size:16px;
border:1px solid #ccc;
padding:10px;
line-height: 18px;
}
.input-box button {
width:100px;
padding:10px;
font-size:16px;
border:1px solid #ccc;
background: #f5f5f5;
cursor: pointer;
line-height: 18px;
border-left:none;
}
ul {
list-style: none;
margin:0;
padding:0;
}
.todo-list {
margin-top:20px;
}
.todo-list li{
border:1px solid #ccc;
padding:10px;
margin-bottom:10px;
font-size:0;
}
.todo-list i {
margin-right:20px;
display: inline-block;
width:16px;
height:16px;
border:1px solid #ccc;
cursor: pointer;
vertical-align: bottom;
}
.todo-list p {
width:500px;
display: inline-block;
font-size:16px;
margin:0;
}
.todo-list span {
width:50px;
cursor: pointer;
color:red;
font-size:16px; }
.done-list {
margin-top:20px;
}
.done-list li{
border:1px solid #ccc;
padding:10px;
margin-bottom:10px;
background: #999;
color:#ccc;
cursor: not-allowed;
text-decoration: line-through;
}
</style>
</head>
<body>
<div id="app">
<div class="input-box">
<input type="text" v-model.trim="newTodo" placeholder="请输入代办事项">
<button @click="addTodo">添 加</button>
</div> <div class="todo-list">
<ul>
<li v-for="(todo,index) in todoList" :key="index">
<i @click="addDone(index)"></i>
<p>{{ todo }}</p>
<span @click="deleteTodo(index)">×</span>
</li>
</ul>
</div> <h3>已完成</h3>
<div class="done-list">
<ul>
<li v-for="done in doneList" :key="done">{{ done }}</li>
</ul>
</div>
</div> <script src="../dist/js/vue.js"></script>
<script>
new Vue({
el:"#app",
data: {
todoList: ['今天代码敲三遍', '晚上和小莉莉去喝酒'],
doneList: [],
newTodo:''
},
methods: {
addTodo() {
//如果输入框是空的，不执行
if (this.newTodo.length === 0) {
return;
}
//添加内容到 代办事项
this.todoList.push(this.newTodo)
//清空输入框
this.newTodo = '';
},
deleteTodo(index) {
this.todoList.splice(index, 1)
},
addDone(index) {
//把内容添加到 doneList
this.doneList.push(this.todoList[index])
//从todoList删掉
this.deleteTodo(index);
}
}
})
</script>
</body>
</html>
todolist