1、指令
·v-html,v-text (单项绑定：数据变，视图变)
<!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>
//{{表达式}}：插值表达式只能用在标签体中，调用之后有返回值，可以调用vm中的数据和方法
<div id="app">
{{msg}} {{1+1}} {{hello()}}<br/>
<span v-html="msg"></span> //不会转义msg中的<h1>标签
<br/>
<span v-text="msg"></span> //会转义msg中的<h1>标签
</div> <script src="/node_modules/vue/dist/vue.js"></script> <script> let vm = new Vue({
el:"#app", //绑定元素
data:{ //封装数据
msg:"<h1>hello</h1>"
},
methods: { //封装方法
hello(){
return "world";
} }, });
</script>
</body>
</html>
·v-bind （单向绑定） :v-bind给HTML标签属性绑定值,用于增强标签属性
<!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>
<!-- v-bind给HTML标签属性绑定值 -->
<div id="app">
<a v-bind:href="link">gogogo</a> //v-bind:href等同于:href
</div>
<script src="/node_modules/vue/dist/vue.js"></script>
<script>
let vm = new Vue({
el:"#app",
data:{
link:"http://www.baidu.com"
}
})
</script>
</body>
</html>
·v-model (双向绑定：数据变，视图变，反之亦然)
<!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>
<!--表单项，自定义组件 -->
<div id="app">
精通的语言
<input type="checkbox" v-model="language" value="java">java<br/>
<input type="checkbox" v-model="language" value="php">php<br/>
<input type="checkbox" v-model="language" value="python">python<br/>
选中了 {{language.join(",")}}
</div>
<script src="/node_modules/vue/dist/vue.js"></script>
<script>
let vm = new Vue({
el:"#app",
data:{
language:[]
}
})
</script>
</body>
</html>
·v-on (绑定事件)
语法： v-on:事件名="js 片段或函数名"
另外，事件绑定可以简写，例如`v-on:click='add'`可以简写为`@click='add'`
<!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">
<!--事件中直接写 js 片段-->
<button v-on:click="num++">点赞</button>
<!--事件指定一个回调函数，必须是 Vue 实例中定义的函数-->
<button v-on:click="decrement">取消</button>
<h1>有{{num}}个赞</h1>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script type="text/javascript">
let vm = new Vue({
el: "#app",
data: {
num: 100
},
methods: {
decrement() {
this.num--; //要使用 data 中的属性，必须 this.属性名
}
}
})
</script
</body>
</html>
标签：el,vue,前端,绑定,基础,vm,Document,data,app From： https://www.cnblogs.com/hu-junmin777/p/16847290.html