1、强制绑定css和style
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>04_class与style绑定</title>
<style>
.classA {
color: red;
}
.classB {
background: blue;
}
.classC {
font-size: 20px;
}
</style>
</head>
<body>
<!--
1. 理解
在应用界面中, 某个(些)元素的样式是变化的
class/style绑定就是专门用来实现动态样式效果的技术
2. class绑定: :class='xxx'
xxx是字符串
xxx是对象
xxx是数组
3. style绑定
:style="{ color: activeColor, fontSize: fontSize + 'px' }"
其中activeColor/fontSize是data属性
-->
<div id="demo">
<h2>1. class绑定: :class='xxx'</h2>
<p :class="myClass">xxx是字符串</p>
<p :class="{classA: hasClassA, classB: hasClassB}">xxx是对象</p>
<p :class="['classA', 'classB']">xxx是数组</p>
<h2>2. style绑定</h2>
<p :style="{color:activeColor, fontSize}">:style="{ color: activeColor, fontSize: fontSize + 'px' }"</p>
<button @click="update">更新</button>
</div>
<script type="text/javascript" src="../js/vue.js"></script>
<script type="text/javascript">
new Vue({
el: '#demo',
data: {
myClass: 'classA',
hasClassA: true,
hasClassB: false,
activeColor: 'red',
fontSize: '20px'
},
methods: {
update () {
this.myClass = 'classB'
this.hasClassA = !this.hasClassA
this.hasClassB = !this.hasClassB
this.activeColor = 'yellow'
this.fontSize = '30px'
}
}
})
</script>
</body>
</html>参考1：
https://cn.vuejs.org/v2/guide/class-and-style.html
https://github.com/Monine/monine.github.io/issues/19
http://aicoder.com/vue/preview/all.html#301
https://juejin.im/entry/5a54b747518825734216c3df
https://blog.csdn.net/gccll/article/details/71814685
2、条件渲染
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>08_条件渲染</title>
</head>
<body>
<!--
1. 条件渲染指令
v-if
v-else
v-show
2. 比较v-if与v-show
如果需要频繁切换 v-show 较好
-->
<div id="demo">
<p v-if="ok">表白成功</p>
<p v-else>表白失败</p>
<hr>
<p v-show="ok">求婚成功</p>
<p v-show="!ok">求婚失败</p>
<button @click="ok=!ok">切换</button>
</div>
<script type="text/javascript" src="../js/vue.js"></script>
<script type="text/javascript">
new Vue({
el: '#demo',
data: {
ok: true,
}
})
</script>
</body>
</html>参考2：
https://cn.vuejs.org/v2/guide/conditional.html
https://www.cnblogs.com/wmhuang/p/5420344.html
https://blog.csdn.net/farYang/article/details/53012172
https://blog.csdn.net/jian_xi/article/details/68486836
https://www.w3cplus.com/vue/v-if-vs-v-show.html
https://cythilya.github.io/2017/04/22/vue-conditional-rendering/
3、列表渲染
遍历数组、遍历对象
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>06_列表渲染</title>
</head>
<body>
<!--
1. 列表显示
数组: v-for / index
对象: v-for / key
2. 列表的更新显示
删除item
替换item
-->
<div id="demo">
<h2>测试: v-for 遍历数组</h2>
<ul>
<li v-for="(p, index) in persons" :key="index">
{{index}}--{{p.name}}--{{p.age}}
--<button @click="deleteP(index)">删除</button>
--<button @click="updateP(index, {name:'Cat', age: 16})">更新</button>
</li>
</ul>
<button @click="addP({name: 'xfzhang', age: 18})">添加</button>
<h2>测试: v-for 遍历对象</h2>
<ul>
<li v-for="(item, key) in persons[1]" :key="key">{{key}}={{item}}</li>
</ul>
</div>
<script type="text/javascript" src="../js/vue.js"></script>
<script type="text/javascript">
new Vue({
el: '#demo',
data: {
persons: [
{name: 'Tom', age:18},
{name: 'Jack', age:17},
{name: 'Bob', age:19},
{name: 'Mary', age:16}
]
},
methods: {
deleteP (index) {
this.persons.splice(index, 1) // 调用了不是原生数组的splice(), 而是一个变异(重写)方法
// 1. 调用原生的数组的对应方法
// 2. 更新界面
},
updateP (index, newP) {
console.log('updateP', index, newP)
// this.persons[index] = newP // vue根本就不知道
this.persons.splice(index, 1, newP)
// this.persons = []
},
addP (newP) {
this.persons.push(newP)
}
}
})
</script>
</body>
</html>参考3：
https://cn.vuejs.org/v2/guide/list.html
https://github.com/youngwind/blog/issues/91