Day02Code
2018-07-28 本文已影响0人
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汤小洋Vue课程代码记录
课程连接地址：http://edu.51cto.com/course/10543.html
抄录至简书仅方便自己查阅，小伙伴们可以去学院支持该课程
code01
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>发送AJAX请求</title>
<script src="js/vue.js"></script>
<script src="js/axios.min.js"></script>
<script src="js/vue-resource.min.js"></script>
<script>
window.onload=function(){
new Vue({
el:'#itany',
data:{
user:{
// name:'alice',
// age:19
},
uid:''
},
methods:{
send(){
axios({
method:'get',
url:'user.jsonaaa'
}).then(function(resp){
console.log(resp.data);
}).catch(resp => {
// console.log(resp);
console.log('请求失败：'+resp.status+','+resp.statusText);
});
},
sendGet(){
// axios.get('server.php?name=tom&age=23')
axios.get('server.php',{
params:{
name:'alice',
age:19
}
})
.then(resp => {
console.log(resp.data);
}).catch(err => {
console.log('请求失败：'+err.status+','+err.statusText);
});
},
sendPost(){
// axios.post('server.php',{
// name:'alice',
// age:19
// })
// axios.post('server.php','name=alice&age=20&') //方式1
axios.post('server.php',this.user,{
transformRequest:[
function(data){
let params='';
for(let index in data){
params+=index+'='+data[index]+'&';
}
return params;
}
]
})
.then(resp => {
console.log(resp.data);
}).catch(err => {
console.log('请求失败：'+err.status+','+err.statusText);
});
},
getUserById(uid){
axios.get(`https://api.github.com/users/${uid}`)
.then(resp => {
// console.log(resp.data);
this.user=resp.data;
});
},
sendJSONP(){
//https://sug.so.360.cn/suggest?callback=suggest_so&encodein=utf-8&encodeout=utf-8&format=json&fields=word&word=a
this.$http.jsonp('https://sug.so.360.cn/suggest',{
params:{
word:'a'
}
}).then(resp => {
console.log(resp.data.s);
});
},
sendJSONP2(){
//https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd=a&json=1&p=3&sid=1420_21118_17001_21931_23632_22072&req=2&csor=1&cb=jQuery110208075694879886905_1498805938134&_=1498805938138
this.$http.jsonp('https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su',{
params:{
wd:'a'
},
jsonp:'cb' //百度使用的jsonp参数名为cb，所以需要修改
}).then(resp => {
console.log(resp.data.s);
});
}
}
});
}
</script>
</head>
<body>
<div id="itany">
<button @click="send">发送AJAX请求</button>
<button @click="sendGet">GET方式发送AJAX请求</button>
<button @click="sendPost">POST方式发送AJAX请求</button>
<hr>
<br>
GitHub ID： <input type="text" v-model="uid">
<button @click="getUserById(uid)">获取指定GitHub账户信息并显示</button>
<br>
姓名：{{user.name}} <br>
头像：<img :src="user.avatar_url" alt="">
<hr>
<button @click="sendJSONP">向360搜索发送JSONP请求</button>
<button @click="sendJSONP2">向百度搜索发送JSONP请求</button>
</div>
</body>
</html>
code02
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>发送AJAX请求</title>
<style>
.current{
background-color:#ccc;
}
</style>
<script src="js/vue.js"></script>
<script src="js/vue-resource.min.js"></script>
<script>
window.onload=function(){
new Vue({
el:'#itany',
data:{
keyword:'',
myData:[],
now:-1 //当前选中项的索引
},
methods:{
getData(e){
//如果按方向键上、下，则不发请求
if(e.keyCode==38||e.keyCode==40)
return;
this.$http.jsonp('https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su',{
params:{
wd:this.keyword
},
jsonp:'cb'
}).then(resp => {
this.myData=resp.data.s;
});
},
changeDown(){
this.now++;
this.keyword=this.myData[this.now];
if(this.now==this.myData.length){
this.now=-1;
}
},
changeUp(){
this.now--;
this.keyword=this.myData[this.now];
if(this.now==-2){
this.now=this.myData.length-1;
}
}
}
});
}
</script>
</head>
<body>
<div id="itany">
<input type="text" v-model="keyword" @keyup="getData($event)" @keydown.down="changeDown" @keydown.up.prevent="changeUp">
<ul>
<li v-for="(value,index) in myData" :class="{current:index==now}">
{{value}}
</li>
</ul>
<p v-show="myData.length==0">暂无数据....</p>
</div>
</body>
</html>
code03
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Vue生命周期</title>
<script src="js/vue.js"></script>
<script>
window.onload=function(){
let vm=new Vue({
el:'#itany',
data:{
msg:'welcome to itany'
},
methods:{
update(){
this.msg='欢迎来到南京网博！';
},
destroy(){
// this.$destroy();
vm.$destroy();
}
},
beforeCreate(){
alert('组件实例刚刚创建，还未进行数据观测和事件配置');
},
created(){ //常用！！！
alert('实例已经创建完成，并且已经进行数据观测和事件配置');
},
beforeMount(){
alert('模板编译之前，还没挂载');
},
mounted(){ //常用！！！
alert('模板编译之后，已经挂载，此时才会渲染页面，才能看到页面上数据的展示');
},
beforeUpdate(){
alert('组件更新之前');
},
updated(){
alert('组件更新之后');
},
beforeDestroy(){
alert('组件销毁之前');
},
destroyed(){
alert('组件销毁之后');
}
});
}
</script>
</head>
<body>
<div id="itany">
{{msg}}
<br>
<button @click="update">更新数据</button>
<button @click="destroy">销毁组件</button>
</div>
</body>
</html>
code04
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>计算属性</title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="itany">
<!--
1.基本用法
-->
<h2>{{msg}}</h2>
<h2>{{msg2}}</h2>
<!-- 对数据处理再显示 -->
<h2>{{msg.split(' ').reverse().join(' ')}}</h2>
<h2>{{reverseMsg}}</h2>
<button @click="change">修改值</button>
<!--
2.计算属性 vs 方法
-->
<!-- <h2>{{num1}}</h2>
<h2>{{num2}}</h2>
<h2>{{getNum2()}}</h2> -->
<button onclick="fn()">测试</button>
<!--
3.get和set
-->
<h2>{{num2}}</h2>
<button @click="change2">修改计算属性</button>
</div>
<script>
var vm=new Vue({
el:'#itany',
data:{ //普通属性
msg:'welcome to itany',
num1:8
},
computed:{ //计算属性
msg2:function(){ //该函数必须有返回值，用来获取属性，称为get函数
return '欢迎来到南京网博';
},
reverseMsg:function(){
//可以包含逻辑处理操作，同时reverseMsg依赖于msg
return this.msg.split(' ').reverse().join(' ');
},
num2:{
get:function(){
console.log('num2：'+new Date());
return this.num1-1;
},
set:function(val){
// console.log('修改num2值');
// this.num2=val;
this.num1=111;
}
}
},
methods:{
change(){
// this.msg='i love you';
this.num1=666;
},
getNum2(){
console.log(new Date());
return this.num1-1;
},
change2(){
this.num2=111;
}
}
});
function fn(){
setInterval(function(){
// console.log(vm.num2);
console.log(vm.getNum2());
},1000);
}
</script>
</body>
</html>
code05
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>vue实例的属性和方法</title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="itany">
{{msg}}
<h2 ref="hello">你好</h2>
<p ref="world">世界</p>
<hr>
<h1 ref="title">标题：{{name}}</h1>
</div>
<script>
/*var vm=new Vue({
// el:'#itany',
data:{
msg:'welcome to itany'
},
name:'tom',
age:24,
show:function(){
console.log('show');
}
});*/
/**
* 属性
*/
//vm.属性名 获取data中的属性
// console.log(vm.msg);
//vm.$el 获取vue实例关联的元素
// console.log(vm.$el); //DOM对象
// vm.$el.style.color='red';
//vm.$data //获取数据对象data
// console.log(vm.$data);
// console.log(vm.$data.msg);
//vm.$options //获取自定义属性
// console.log(vm.$options.name);
// console.log(vm.$options.age);
// vm.$options.show();
//vm.$refs 获取所有添加ref属性的元素
// console.log(vm.$refs);
// console.log(vm.$refs.hello); //DOM对象
// vm.$refs.hello.style.color='blue';
/**
* 方法
*/
//vm.$mount() 手动挂载vue实例
// vm.$mount('#itany');
var vm=new Vue({
data:{
msg:'欢迎来到南京网博',
name:'tom'
}
}).$mount('#itany');
//vm.$destroy() 销毁实例
// vm.$destroy();
// vm.$nextTick(callback) 在DOM更新完成后再执行回调函数，一般在修改数据之后使用该方法，以便获取更新后的DOM
//修改数据
vm.name='汤姆';
//DOM还没更新完，Vue实现响应式并不是数据发生改变之后DOM立即变化，需要按一定的策略进行DOM更新，需要时间！！
// console.log(vm.$refs.title.textContent);
vm.$nextTick(function(){
//DOM更新完成，更新完成后再执行此代码
console.log(vm.$refs.title.textContent);
});
</script>
</body>
</html>
code06
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>添加和删除属性：$set、$delete</title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="itany">
<button @click="doUpdate">修改属性</button>
<button @click="doAdd">添加属性</button>
<button @click="doDelete">删除属性</button>
<hr>
<h2>{{user.name}}</h2>
<h2>{{user.age}}</h2>
</div>
<script>
var vm=new Vue({
el:'#itany',
data:{
user:{
id:1001,
name:'tom'
}
},
methods:{
doUpdate(){
this.user.name='汤姆'
},
doAdd(){
// this.user.age=25; //通过普通方式为对象添加属性时vue无法实时监视到
// this.$set(this.user,'age',18); //通过vue实例的$set方法为对象添加属性，可以实时监视
// Vue.set(this.user,'age',22);
if(this.user.age){
this.user.age++;
}else{
Vue.set(this.user,'age',1);
}
// console.log(this.user);
},
doDelete(){
if(this.user.age){
// delete this.user.age; //无效
Vue.delete(this.user,'age');
}
}
}
});
</script>
</body>
</html>
code07
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>监视数据的变化：$watch</title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="itany">
<input type="text" v-model="name">
<h3>{{name}}</h3>
<hr>
<input type="text" v-model="age">
<h3>{{age}}</h3>
<hr>
<input type="text" v-model="user.name">
<h3>{{user.name}}</h3>
</div>
<script>
var vm=new Vue({
el:'#itany',
data:{
name:'tom',
age:23,
user:{
id:1001,
name:'alice'
}
},
watch:{ //方式2：使用vue实例提供的watch选项
age:(newValue,oldValue) => {
console.log('age被修改啦，原值：'+oldValue+'，新值：'+newValue);
},
user:{
handler:(newValue,oldValue) => {
console.log('user被修改啦，原值：'+oldValue.name+'，新值：'+newValue.name);
},
deep:true //深度监视，当对象中的属性发生变化时也会监视
}
}
});
//方式1：使用vue实例提供的$watch()方法
vm.$watch('name',function(newValue,oldValue){
console.log('name被修改啦，原值：'+oldValue+'，新值：'+newValue);
});
</script>
</body>
</html>
code08
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>自定义指令</title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="itany">
<!-- <h3 v-hello>{{msg}}</h3> -->
<button @click="change">更新数据</button>
<h3 v-world:wbs17022.hehe.haha="username">{{msg}}</h3>
<!-- <p v-world>网博，专业的前端培训</p> -->
<!-- <h3 v-wbs>网博</h3> -->
<input type="text" v-model="msg" v-focus>
</div>
<script>
/**
* 自定义全局指令
* 注：使用指令时必须在指名名称前加前缀v-，即v-指令名称
*/
Vue.directive('hello',{
bind(){ //常用！！
alert('指令第一次绑定到元素上时调用，只调用一次，可执行初始化操作');
},
inserted(){
alert('被绑定元素插入到DOM中时调用');
},
update(){
alert('被绑定元素所在模板更新时调用');
},
componentUpdated(){
alert('被绑定元素所在模板完成一次更新周期时调用');
},
unbind(){
alert('指令与元素解绑时调用，只调用一次');
}
});
//钩子函数的参数
Vue.directive('world',{
bind(el,binding){
// console.log(el); //指令所绑定的元素，DOM对象
// el.style.color='red';
console.log(binding); //name
}
});
//传入一个简单的函数，bind和update时调用
Vue.directive('wbs',function(){
alert('wbs17022');
});
var vm=new Vue({
el:'#itany',
data:{
msg:'welcome to itany',
username:'alice'
},
methods:{
change(){
this.msg='欢迎来到南京网博'
}
},
directives:{ //自定义局部指令
focus:{
//当被绑定元素插入到DOM中时获取焦点
inserted(el){
el.focus();
}
}
}
});
</script>
</body>
</html>
code09
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>练习：自定义指令</title>
<script src="js/vue.js"></script>
<style>
#itany div{
width: 100px;
height: 100px;
position:absolute;
}
#itany .hello{
background-color:red;
top:0;
left:0;
}
#itany .world{
background-color:blue;
top:0;
right:0;
}
</style>
</head>
<body>
<div id="itany">
<div class="hello" v-drag>itany</div>
<div class="world" v-drag>网博</div>
</div>
<script>
Vue.directive('drag',function(el){
el.onmousedown=function(e){
//获取鼠标点击处分别与div左边和上边的距离：鼠标位置-div位置
var disX=e.clientX-el.offsetLeft;
var disY=e.clientY-el.offsetTop;
// console.log(disX,disY);
//包含在onmousedown里面，表示点击后才移动，为防止鼠标移出div，使用document.onmousemove
document.onmousemove=function(e){
//获取移动后div的位置：鼠标位置-disX/disY
var l=e.clientX-disX;
var t=e.clientY-disY;
el.style.left=l+'px';
el.style.top=t+'px';
}
//停止移动
document.onmouseup=function(e){
document.onmousemove=null;
document.onmouseup=null;
}
}
});
var vm=new Vue({
el:'#itany',
data:{
msg:'welcome to itany',
username:'alice'
},
methods:{
change(){
this.msg='欢迎来到南京网博'
}
}
});
</script>
</body>
</html>
code10
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>动画</title>
<script src="js/vue.js"></script>
<style>
p{
width: 300px;
height: 300px;
background-color:red;
}
.fade-enter-active,.fade-leave-active{
transition:all 3s ease;
}
.fade-enter-active{
opacity:1;
width:300px;
height:300px;
}
.fade-leave-active{
opacity:0;
width:50px;
height:50px;
}
/* .fade-enter需要放在.fade-enter-active的后面 */
.fade-enter{
opacity:0;
width: 100px;
height: 100px;
}
</style>
</head>
<body>
<div id="itany">
<button @click="flag=!flag">点我</button>
<transition name="fade"
@before-enter="beforeEnter"
@enter="enter"
@after-enter="afterEnter"
@before-leave="beforeLeave"
@leave="leave"
@after-leave="afterLeave"
>
<p v-show="flag">网博</p>
</transition>
</div>
<script>
var vm=new Vue({
el:'#itany',
data:{
flag:false
},
methods:{
beforeEnter(el){
// alert('动画进入之前');
},
enter(){
// alert('动画进入');
},
afterEnter(el){
// alert('动画进入之后');
el.style.background='blue';
},
beforeLeave(){
// alert('动画即将之前');
},
leave(){
// alert('动画离开');
},
afterLeave(el){
// alert('动画离开之后');
el.style.background='red';
}
}
});
</script>
</body>
</html>
code11
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>动画</title>
<link rel="stylesheet" href="css/animate.css">
<script src="js/vue.js"></script>
<style>
p{
width: 300px;
height: 300px;
background-color:red;
margin:0 auto;
}
</style>
</head>
<body>
<div id="itany">
<button @click="flag=!flag">点我</button>
<transition enter-active-class="animated fadeInLeft" leave-active-class="animated fadeOutRight">
<p v-show="flag">网博</p>
</transition>
</div>
<script>
var vm=new Vue({
el:'#itany',
data:{
flag:false
}
});
</script>
</body>
</html>
code12
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>多元素动画</title>
<link rel="stylesheet" href="css/animate.css">
<script src="js/vue.js"></script>
<style>
p{
width: 100px;
height: 100px;
background-color:red;
margin:20px auto;
}
</style>
</head>
<body>
<div id="itany">
<button @click="flag=!flag">点我</button>
<transition-group enter-active-class="animated bounceInLeft" leave-active-class="animated bounceOutRight">
<p v-show="flag" :key="1">itany</p>
<p v-show="flag" :key="2">网博</p>
</transition-group>
</div>
<script>
var vm=new Vue({
el:'#itany',
data:{
flag:false
}
});
</script>
</body>
</html>
code13
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>练习：多元素动画</title>
<link rel="stylesheet" href="css/animate.css">
<script src="js/vue.js"></script>
<style>
p{
width: 100px;
height: 100px;
background-color:red;
margin:20px auto;
}
</style>
</head>
<body>
<div id="itany">
<input type="text" v-model="name">
<transition-group enter-active-class="animated bounceInLeft" leave-active-class="animated bounceOutRight">
<p v-for="(v,k) in arr2" :key="k">
{{v}}
</p>
</transition-group>
</div>
<script>
var vm=new Vue({
el:'#itany',
data:{
flag:true,
arr:['tom','jack','mike','alice','alex','mark'],
name:''
},
computed:{
arr2:function(){
var temp=[];
this.arr.forEach(val => {
if(val.includes(this.name)){
temp.push(val);
}
});
return temp;
}
}
});
</script>
</body>
</html>
