插值表达式与v-text,v-html
插值表达式
{ {}}双大括号，里面可以取vue对象里面的值，也可以是任何的表达式，只要有返回值是方法也可以。
<div id="app">
{
{msg}} {
{1+1}} {
{hello()}}<br/>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
msg:"<h1>Hello</h1>"
},
methods:{
hello(){
return "World"
}
}
})
</script>
v-text,v-html
v-text显示只是原来的元素
v-html可以讲元素当html片段渲染
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="app">
{
{msg}} {
{1+1}} {
{hello()}}<br/>
<!-- 用v-html取内容 -->
<span v-html="msg"></span>
<br/>
<!-- 原样显示 -->
<span v-text="msg"></span>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
msg:"<h1>Hello</h1>",
link:"http://www.baidu.com"
},
methods:{
hello(){
return "World"
}
}
})
</script>
</body>
</html>
单向绑定v-bind
用v-bind:，简写为:。表示把model绑定到view。可以设置src、title、class等
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<!-- 给html标签的属性绑定 -->
<div id="app">
<a v-bind:href="link">gogogo</a>
<!-- class,style {class名：加上？}-->
<span v-bind:class="{active:isActive,'text-danger':hasError}"
:style="{
color: color1,fontSize: size}">你好</span>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
let vm = new Vue({
el:"#app",
data:{
link: "http://www.baidu.com",
isActive:true,
hasError:true,
color1:'red',
size:'36px'
}
})
</script>
</body>
</html>
双向绑定v-model
一般用于表单项，自定义组件
可以实现页面元素和model内对象的双向绑定
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<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>