使用methods屬性
例子：method.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<h2>{{greeting('Afternoon')}}</h2>
<h2>{{message}}</h2>
</div>
<script>
var app=new Vue({
el:'#app',
data:{
message:'hello Vue'
},
methods:{
greeting:function(time){
return 'good'+time+'!'
}
}
})
</script>
</body>
</html>
運行結(jié)果
使用語法糖
v-on→@和v-on→:
例子：點我：v-on.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<button type="button" @click="handleClick">點我</button>
</div>
<script type="text/javascript">
var app=new Vue({
el:'#app',
data:{
name:'軟件1721'
},
methods:{
handleClick:function(){
alert(this.name);
}
}
})
</script>
</body>
</html>
運行結(jié)果：
隱藏和顯示1721：v-on1
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>v-on指令練習(xí)-隱藏和顯示的切換練習(xí)</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<h2 v-if="show">{{name}}</h2>
<button type="button" @click="handleClick">隱藏/顯示</button>
</div>
<script>
var app=new Vue({
el:'#app',
data:{
name:'軟件1721',
show:true
},
methods:{
handleClick:function(){
/* if(this.show===true){
this.show===false;
}else{
this.show===true
} */
this.show=!this.show;
}
}
})
</script>
</body></html>
運行結(jié)果：
加一歲和減五歲:v-on2.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<title>年齡的加減</title>
</head>
<body>
<div id="app">
<h2>{{age}}</h2>
<button type="button" @click="add">加一歲</button>
<button type="button" @click="substrct(5)">減五歲</button>
</div>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
age: 30
},
methods: {
add: function() {
/* if (this.show === true) {
this.show = false;
} else {
this.show = true;
} */
this.age += 1;
},
substrct: function(num) {
if (this.age < 5) {
alert("不能再減了");
return;
}
this.age -= num;
}
}
})
</script>
</body>
</html>
簡書作者+關(guān)注:v-on3.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<title>關(guān)注和取消關(guān)注</title>
<link rel="stylesheet" type="text/css" href="css/font-awesome.min.css"/>
<style type="text/css">
.followed{
color: #ddd;
}
.link{
cursor: pointer;
}
.cancle-followed{
color: green;
}
</style>
</head>
<body>
<div id="app">
<h2>{{name}}</h2>
<span class="followed link" v-show="followed" @click="handlefollow">
<i class="icon-ok"></i>已關(guān)注
</span>
<span class="cancle-followed link" v-show="followed===false" @click="handlefollow">
<i class="icon-plus"></i>關(guān)注
</span>
</div>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
name:'簡述作者',
followed:false
},
methods: {
handlefollow:function(){
this.followed=!this.followed;
}
}
})
</script>
</body>
</html>
運行結(jié)果：
模仿簡書下面點喜歡做的圖：likestyle.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<link rel="stylesheet" type="text/css" href="css/font-awesome.min.css"/>
<title>喜歡的樣式</title>
<style type="text/css">
.btn{
width: 100px;
height: 40px;
color: rgb(234,111,90);
border-radius: 20px;
font-size: 14px;
background-color: #FFFFFF;
border: 1px solid rgb(234,111,90);
outline:none;
}
</style>
</head>
<body>
<div id="app">
<button type="button" @click="handlefollow" class="btn">
<span class="followed link" v-show="followed" @click="handlefollow">
<i class="icon-heart"></i>喜歡 | {{number}}
</span>
<span class="cancle-followed link" v-show="followed===false" @click="handlefollow">
<i class="icon-heart-empty"></i>喜歡 | {{number}}
</span>
</button>
</div>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
followed:false,
number: 30
},
methods: {
add: function() {
/* if (this.show === true) {
this.show = false;
} else {
this.show = true;
} */
this.number += 1;
},
substrct: function(num) {
if (this.age < 5) {
alert("不能再減了");
return;
}
this.age -= num;
}
}
})
</script>
</body>
</html>
運行結(jié)果：
