三 .web框架-----------VUE语法使用（三）
一 .VUE使用 https://cn.vuejs.org/v2/guide/routing.html
1.Vue成员获取(挂载)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
{{a}}
</div>
<script>
//vm.$el -> 就是元素
var vm=new Vue({
el:'#box',
data:{
a:1
}
});
//alert(vm.$el);
vm.$el.style.background='red';
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
{{a}}
</div>
<script>
// vm.$data -> 就是data
var vm=new Vue({
el:'#box',
data:{
a:1
}
});
console.log(vm.$data.a);
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
<span v-text="a"></span>
</div>
<script>
// vm.$mount -> 手动挂在vue程序
//angular.bootstrap
/*var vm=new Vue({
data:{
a:1
}
});
vm.$mount('#box'); //手动挂载*/
var vm=new Vue({
data:{
a:1
}
}).$mount('#box');
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
<span v-text="a"></span>
<br>
{{aa}}
</div>
<script>
//vm.$options -> 获取自定义属性
var vm=new Vue({
aa:114444, //自定义属性,
show:function(){
alert(1);
},
data:{
a:"vm.$options -> 获取自定义属性"
}
}).$mount('#box');
vm.$options.show();
console.log(vm.$options.aa);
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
<span v-text="a"></span>
</div>
<script>
// vm.$log(); -> 查看现在数据的状态
var vm=new Vue({
data:{
a:33333333,
b:44444444444
}
}).$mount('#box');
console.log(vm.$log());
</script>
</body>
</html>
2. 计算属性computed
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
a => {{a}}
<br>
b => {{b}}
</div>
<script>
//* computed里面可以放置一些业务逻辑代码，一定记得return
var vm=new Vue({
el:'#box',
data:{
a:1
},
computed:{
b:function(){
//业务逻辑代码
return 2;
}
}
});
console.log(vm.a);
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
a => {{a}}
<br>
b => {{b}}
</div>
<script>
//* computed里面可以放置一些业务逻辑代码，一定记得return
vax',
datar vm=new Vue({
el:'#box:{
a:1
},
computed:{
b:function(){
//业务逻辑代码
return this.a+1;
}
}
});
document.onclick=function(){
vm.a=101;
};
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
</script>
</head>
<body>
<div id="box">
a => {{a}}
<br>
b => {{b}}
</div>
<script>
//* computed里面可以放置一些业务逻辑代码，一定记得return
var vm=new Vue({
el:'#box',
data:{
a:1
},
computed:{
b:{
get:function(){
return this.a+2;
},
set:function(val){
this.a=val;
}
}
}
});
document.onclick=function(){
vm.b=45;
};
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
<meta charset="UTF-8">
<title>Title</title>
<!--引入最新的vue稳定版本-->
<script src="vue.js"></script>
</head>
<body>
<div id="app">
总价： {{ prices }}
</div>
<!--script脚本-->
<script>
var app = new Vue({
el: '#app',
data: {
package1: [
{
"name":'iPhone7',
"price":5000,
"count": 1
},
{
"name":'ipad',
"price":1000,
"count": 1
}
],
package2: [
{
"name":'apple',
"price":2000,
"count": 2
},
{
"name":'banana',
"price":2000,
"count": 2
}
],
},
computed: {
prices: function () {
//this指向的是当前vue实例对象
//计算总价
var prices=0;
//遍历第一个
for (var i=0;i<this.package1.length;i++ ) {
prices=prices+this.package1[i].price*this.package1[i].count;
}
//遍历第二个数组
for (var i=0;i<this.package2.length;i++ ) {
prices=prices+this.package2[i].price*this.package2[i].count;
}
return prices;
}
}
})
</script>
</body>
</html>
3. $watch 监听数据变化
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
window.onload=function(){
var vm=new Vue({
el:'#box',
data:{
a:111,
b:2
}
});
vm.$watch('a',function(){
// alert('发生变化了');
this.b=this.a+100;
});
document.onclick=function(){
vm.a=1;
};
};
</script>
</head>
<body>
<div id="box">
{{a}}
<br>
{{b}}
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
window.onload=function(){
var vm=new Vue({
el:'#box',
data:{
json:{name:'strive',age:16},
b:2
}
});
vm.$watch('json',function(){
alert('发生变化了');
});
document.onclick=function(){
vm.json.name='aaa';
};
};
</script>
</head>
<body>
<div id="box">
{{json | json}}
<br>
{{b}}
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>智能社——http://www.zhinengshe.com</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<style>
</style>
<script src="vue.js"></script>
<script>
window.onload=function(){
var vm=new Vue({
el:'#box',
data:{
json:{name:'strive',age:16},
b:2
}
});
vm.$watch('json',function(){
alert('发生变化了');
},{deep:true}); //{deep:true})深度监视
document.onclick=function(){
vm.json.name='aaa';
};
};
</script>
</head>
<body>
<div id="box">
{{json | json}}
<br>
{{b}}
</div>
</body>
</html>
4.
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