v-on
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div id="app">
<p>{{count}}</p>
<div><input type="button" value="-" v-on:click="sub"> <input type="button" value="+" @click="add"></div>
</div> <script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: "#app",
data:{
count:0,
},
methods:{
add(){
this.count++
},
sub(){
this.count--
}
}
}) </script>
</body>
</html>
v-on参数
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div id="app">
<p>{{count}}</p>
<!-- 绑定事件是不需要传参的括号可省略 -->
<div>
<input type="button" value="按钮1" v-on:click="sub()">
<input type="button" value="按钮2" @click="add">
<!-- 需要传参时，写小括号不写参数，则传参时undefind。 不写小括号则传参点击事件对象 -->
<input type="button" value="按钮3" @click="btnclick">
<!-- 传参时需要普通参数和事件对象 $event事件参数 -->
<input type="button" value="按钮4" @click="btnclick1('123', $event)">
</div>
</div> <script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: "#app",
data:{
count:0,
},
methods:{
add(){
this.count++
},
sub(){
this.count--
},
btnclick(da){
console.log(da)
},
btnclick1(da, event){
console.log(da, event)
}
}
}) </script>
</body>
</html>
v-on修饰符
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div id="app">
<!-- 阻止冒泡事件 -->
<div @click="divclick">
aaaaaaaaaaa
<input value="button" type="button" @click.stop="btmclick"></input>
</div>
<!-- 表单自己提交 -->
<form action="baidu">
<input type="submit" value="提交" @click.prevent="submitclick">
</form>
<!-- 监听某个键的键帽 -->
<input type="text" @keyup.enter="keyup"></input>
<!-- 只触发一次 -->
<input value="button" type="button" @click.once="btmclick"></input> </div> <script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: "#app",
data:{
count:0,
},
methods:{
btmclick(){
console.log("按钮点击")
},
divclick(){
console.log("div点击")
},
submitclick(){
console.log("表单提交")
},
keyup(){
console.log("键盘抬起")
}
}
}) </script>
</body>
</html>
