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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<script type="text/javascript" src="../js/vue.js"></script>
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</head>
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<body>
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<!--
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条件渲染:
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1.v-if:
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写法:
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1).v-if="表达式"
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2).v-else-if="表达式"
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3).v-else="表达式"
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适用于:
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切换频率较低的场景
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特点:
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不展示的DOM元素直接被移除
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注意:
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v-if可以和v-else,v-else-if一起使用, 但要求结构不能被"打断"
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2.v-show
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写法:
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v-show="表达式"
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适用于:
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切换频率较高的场景
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特点:
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不展示的DOM元素未被移除,仅仅是使用样式隐藏掉
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3.备注:
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1).使用v-if时, 元素可能无法获取到, 而使用v-show一定可以获取到
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2).template不会改变结构, 可以和v-if配合使用批量设置条件渲染
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-->
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<div id="root">
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<h2>当前n的值是{{n}}</h2>
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<button @click="n++">点我n+1</button>
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<!-- 使用v-show做条件渲染 -->
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<!-- <h2 v-show="false">请叫我{{name}}</h2> -->
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<!-- <h2 v-show="a">请叫我{{name}}</h2> -->
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<!-- 使用v-if做条件渲染 -->
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<!-- <h2 v-if="false">请叫我{{name}}</h2> -->
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<!-- <h2 v-if="1 === 1">请叫我{{name}}</h2> -->
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<!-- v-else和v-else-if -->
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<!-- <div v-if="n === 1">死亡赌局</div>
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<div v-if-else="n === 2">超级手机</div>
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<div v-if="n === 3">逍遥小医仙</div>
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<div v-else>绝天神印</div> -->
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<!-- v-if和template的配合使用 -->
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<template v-if="n === 1">
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<h2>你好</h2>
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<h2>请叫我张钧</h2>
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<h2>哈哈哈</h2>
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</template>
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</div>
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</body>
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<script type="text/javascript">
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Vue.config.productionTip = false
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const vm = new Vue({
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el:'#root',
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data:{
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name:'张钧',
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a:false,
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n:0
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},
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})
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</script>
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</html>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<script type="text/javascript" src="../js/vue.js"></script>
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</head>
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<body>
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<!--
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v-for指令：
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1.用于展示列表数据
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2.语法：v-for="(item, index) in xxx" :key="yyy"
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3.可遍历: 数组, 对象, 字符串(用的很少), 指定次数(用的很少)
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-->
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<div id="root">
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<!-- 遍历数组 -->
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<ul>
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<li v-for="p in persons" :key="p.id">{{p.name}}-{{p.age}}</li>
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</ul>
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<ul>
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<li v-for="(p,index) in persons" :key="p.id">{{p}}-{{index}}</li>
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</ul>
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<!-- 遍历对象 -->
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<ul>
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<li v-for="(value,key) in book" :key="key">{{value}}-{{key}}</li>
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</ul>
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<!-- 遍历字符串 -->
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<ul>
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<li v-for="(char,index) in str" :key="index">{{char}}-{{index}}</li>
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</ul>
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<!-- 遍历指定次数 -->
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<ul>
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<li v-for="(num,index) in 10" :key="index">{{num}}-{{index}}</li>
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</ul>
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</div>
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</body>
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<script type="text/javascript">
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Vue.config.productionTip = false
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const vm = new Vue({
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el:'#root',
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data:{
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persons:[
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{id:'001',name:'张钧',age:33},
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{id:'002',name:'温柔',age:23},
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{id:'003',name:'桃梨',age:24},
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{id:'004',name:'琪妙',age:35},
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],
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book:{
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name:'死亡赌局',
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count:123124,
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date:'2023-06-14'
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},
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str:'thisisabook'
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},
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})
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</script>
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</html>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<script type="text/javascript" src="../js/vue.js"></script>
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</head>
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<body>
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<!--
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p30待整理
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-->
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<div id="root">
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<!-- 遍历数组 -->
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<ul>
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<li v-for="p in persons" :key="p.id">{{p.name}}-{{p.age}}</li>
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</ul>
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</div>
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</body>
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<script type="text/javascript">
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Vue.config.productionTip = false
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const vm = new Vue({
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el:'#root',
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data:{
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persons:[
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{id:'001',name:'张钧',age:33},
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{id:'002',name:'温柔',age:23},
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{id:'003',name:'桃梨',age:24},
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{id:'004',name:'琪妙',age:35},
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]
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},
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})
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</script>
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</html>
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@ -0,0 +1,37 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<script type="text/javascript" src="../js/vue.js"></script>
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</head>
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<body>
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<div id="root">
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<form>
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<label for="demo">账号:</label>
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<input type="text" id="demo"><br>
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<label for="pwd">密码:</label>
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<input type="password" id="pwd"><br>
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性别:
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男<input type="radio" name="gender">
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女<input type="radio" name="gender"><br>
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hobby:
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learning <input type="checkbox">
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gamming <input type="checkbox">
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shopping <input type="checkbox"><br>
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books
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<select>
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<option value="">chose your book</option>
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<option value="swdj">死亡赌局</option>
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<option value="cjsj">超级手机</option>
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<option value="xyxyx">逍遥小医仙</option>
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<option value="jysz">绝印神座</option>
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</select><br>
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Others:
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<textarea ></textarea><br>
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阅读并接受<a href="#">《用户协议》</a>
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</form>
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</div>
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</body>
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</html>
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Loading…
Reference in New Issue