Javascript
第167天学习打卡（项目 谷粒商城9 Vue指令）
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Vue 指令
v-text v-html.html
<!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">
{{msg}} <br/>
<span v-html="msg"></span>
<br/>
<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>"
}
})
</script>
</body>
</html>
1.差值表达式
<!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">
{{msg}} {{1+1}} {{hello()}} <br/>
<span v-html="msg"></span>
<br/>
<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>"
},
methods: {
hello(){
return "World"
}
}
})
</script>
</body>
</html>
v-bind.html
<!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>
<!-- 给html标签的属性绑定 -->
<div id="app">
<a v-bind:href="link">gogogo</a>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
link:"http://www.baidu.com"
}
})
</script>
</body>
</html>
<!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>
<!-- 给html标签的属性绑定 -->
<div id="app">
<a v-bind:href="link">gogogo</a>
<!-- class,style -->
<span v-bind:class="{active:isActive, 'text-danger':hasError}">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
}
})
</script>
</body>
</html>
style
<!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>
<!-- 给html标签的属性绑定 -->
<div id="app">
<a v-bind:href="link">gogogo</a>
<!-- class,style 动态改class {class名: 加上?}-->
<span v-bind:class="{active:isActive, 'text-danger':hasError}"
style="color: crimson; font-size: 90px;">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
}
})
</script>
</body>
</html>
<!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>
<!-- 给html标签的属性绑定 -->
<div id="app">
<a v-bind:href="link">gogogo</a>
<!-- class,style 动态改class {class名: 加上?}-->
<span v-bind:class="{active:isActive, 'text-danger':hasError}"
v-bind: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:'30px'
}
})
</script>
</body>
</html>
在控制台动态修改
v-bind可以缩写为:
v-model.html
<!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="C++">C++<br/>
选中了
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
let vm = new Vue({
el:"#app",
data:{
language: []
}
})
</script>
</body>
</html>
<!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="C++">C++<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
<!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="cancle">取消</button>
<!-- -->
<h1>有 {{num}}个赞</h1>
<!-- 事件修饰符 -->
<div style="border: 1px solid red;padding: 20px;">
大div
<div style="border: 1px solid blue;padding: 20px;">
小div <br/>
<a href="http://www.baidu.com">去百度</a>
</div>>
</div>
<!-- 按键修饰符 -->
<input type="text"><br/>
提示：
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
num: 1
},
methods: {
cancle(){
this.num--
}
}
})
</script>
</body>
</html>
v-on可以简写为@
事件修饰符
这里发生了事件冒泡
<!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 @click="cancle">取消</button>
<!-- -->
<h1>有 {{num}}个赞</h1>
<!-- 事件修饰符 -->
<div style="border: 1px solid red;padding: 20px;" v-on:click="hello">
大div
<div style="border: 1px solid blue;padding: 20px;" @click="hello">
小div <br/>
<a href="http://www.baidu.com">去百度</a>
</div>
</div>
<!-- 按键修饰符 -->
<input type="text"><br/>
提示：
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
num: 1
},
methods: {
cancle(){
this.num--
},
hello(){
alert("点击了")
}
}
})
</script>
</body>
</html>
.stop
<!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 @click="cancle">取消</button>
<!-- -->
<h1>有 {{num}}个赞</h1>
<!-- 事件修饰符 -->
<div style="border: 1px solid red;padding: 20px;" v-on:click="hello">
大div
<div style="border: 1px solid blue;padding: 20px;" @click.stop="hello">
小div <br/>
<a href="http://www.baidu.com">去百度</a>
</div>
</div>
<!-- 按键修饰符 -->
<input type="text"><br/>
提示：
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
num: 1
},
methods: {
cancle(){
this.num--
},
hello(){
alert("点击了")
}
}
})
</script>
</body>
</html>
<!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 @click="cancle">取消</button>
<!-- -->
<h1>有 {{num}}个赞</h1>
<!-- 事件修饰符 -->
<div style="border: 1px solid red;padding: 20px;" v-on:click="hello">
大div
<div style="border: 1px solid blue;padding: 20px;" @click.stop="hello">
小div <br/>
<a href="http://www.baidu.com" @click.prevent>去百度</a>
</div>
</div>
<!-- 按键修饰符 -->
<input type="text"><br/>
提示：
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
num: 1
},
methods: {
cancle(){
this.num--
},
hello(){
alert("点击了")
}
}
})
</script>
</body>
</html>
<!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 @click="cancle">取消</button>
<!-- -->
<h1>有 {{num}}个赞</h1>
<!-- 事件修饰符 -->
<div style="border: 1px solid red;padding: 20px;" v-on:click.once="hello">
大div
<div style="border: 1px solid blue;padding: 20px;" @click.stop="hello">
小div <br/>
<a href="http://www.baidu.com" @click.prevent.stop="hello">去百度</a>
</div>
</div>
<!-- 按键修饰符 -->
<input type="text"><br/>
提示：
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
num: 1
},
methods: {
cancle(){
this.num--
},
hello(){
alert("点击了")
}
}
})
</script>
</body>
</html>
按键修饰符
组合按钮
<!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 @click="cancle">取消</button>
<!-- -->
<h1>有 {{num}}个赞</h1>
<!-- 事件修饰符 -->
<div style="border: 1px solid red;padding: 20px;" v-on:click.once="hello">
大div
<div style="border: 1px solid blue;padding: 20px;" @click.stop="hello">
小div <br/>
<a href="http://www.baidu.com" @click.prevent.stop="hello">去百度</a>
</div>
</div>
<!-- 按键修饰符 -->
<input type="text" v-model="num" v-on:keyup.up="num+=2" @keyup.down="num-=2" @click.ctrl="num=10"><br/>
提示：
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
new Vue({
el:"#app",
data:{
num: 1
},
methods: {
cancle(){
this.num--
},
hello(){
alert("点击了")
}
}
})
</script>
</body>
</html>
v-for.html
<!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">
<ul>
<li v-for="user in users">
<!-- 1.显示user信息: v-for="item in items" -->
{{user.name}} ==> {{user.gender}} ==>{{user.age}}
<!-- 2.获取数组下标: v-for="(item,index) in items" -->
<!-- 3.遍历对象：
v-for="value in object"
v-for="(value, key) in object"
v-for="(value, key, index) in object" -->
<!-- 4.遍历的时候都加上:key来区分不同数据，提高vue渲染效率 -->
</li>
</ul>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
let app = new Vue({
el:"#app",
data: {
users: [{name: '肖战', gender: '男', age: 29},
{name: '王一博', gender: '男', age: 23},
{name: '蔡徐坤', gender: '男', age:22},
{name: '杨洋', gender: '男', age:28},
{name: '吴磊', gender: '男',age:21}]
},
})
</script>
</body>
</html>
<!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">
<ul>
<li v-for="(user,index) in users" :key="user.name">
<!-- 1.显示user信息: v-for="item in items" -->
当前索引:{{index}} ==> {{user.name}} ==> {{user.gender}} ==>{{user.age}}<br>
<!-- 2.获取数组下标: v-for="(item,index) in items" -->
<!-- 3.遍历对象：
v-for="value in object"
v-for="(value, key) in object"
v-for="(value, key, index) in object" -->
对象信息:
<span v-for="(v,k,i) in user">{{k}}=={{v}}=={{i}};</span>
<!-- 4.遍历的时候都加上:key来区分不同数据，提高vue渲染效率 -->
</li>
</ul>
<ul>
<li v-for="(num,index) in nums" :key="index"></li>
</ul>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
let app = new Vue({
el:"#app",
data: {
users: [{name: '肖战', gender: '男', age: 29},
{name: '王一博', gender: '男', age: 23},
{name: '蔡徐坤', gender: '男', age:22},
{name: '杨洋', gender: '男', age:28},
{name: '吴磊', gender: '男',age:21}],
nums: [1,2,3,4,4]
},
})
</script>
</body>
</html>
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