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vue学习之插值表达式{{}}与显示数据(v-text和v-html)

news 2025/8/4 0:26:53

1. 记得导入

<!-- 在线导入 -->
<!-- 开发环境版本，包含了用帮助的命令行警告 -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<!-- 生产环境版本，优化了尺寸和速度 -->
<script src="https://cdn.jsdelivr.net/npm/vue"></script><!-- 本地导入 -->
<script src="node_modules/vue/dist/vue.js"></script>

1. 插值表达式{{}}

<html lang="en">
<head><meta charset="UTF-8"><title>vue插值表达式</title><script src="node_modules/vue/dist/vue.js"></script>
</head>
<body><div id="app"><h1>我最喜欢的人是：{{ name }}</h1></div><script type="text/javascript">//创建vue对象var app = new Vue({//让vue接管div标签el:"#app",//定义name值为"刘雨昕"，用于在div中引用data:{name:"刘雨昕"}});</script>
</body>
</html>

2. v-text和v-html

v-text：<span v-text="msg"></span>	<!-- 相当于<span>{{msg}}</span> -->
v-html：<span v-html="msg"></span>	<!-- 相当于<span>{{msg}}</span> -->

v-text：把数据当作纯文本显示.
v-html：遇到html标签,会正常解析

3. v-model的原理

全网最详细的v-model讲解_zayyo的博客-CSDN博客

官方有说到，v-model的原理其实是背后有两个操作：

v-bind绑定value属性的值；
v-on绑定input事件监听到函数中，函数会获取最新的值赋值到绑定的属性中；

    <div class="demo"><textarea v-model="article" cols="30" rows="10"> </textarea><h2>article当前的值是：{{ article }}</h2></div><script type="text/javascript">export default {name: 'demo',data() {return {article: "a"}}}</script>

运行代码当textarea标签中用户输入的内容发生改名，相应的h1标签中的{{article}}也发生同样的更改。

 <input type="checkbox" v-model="sport" value="篮球" />篮球<input type="checkbox" v-model="sport" value="足球" />足球<input type="checkbox" v-model="sport" value="羽毛球球" />羽毛球球<input type="checkbox" v-model="sport" value="兵乓球" />兵乓球您的爱好有：{{ sport }}<script type="text/javascript">export default {name: 'demo',data() {return {message: "内容",sex: '',// 当要 默认选中时要填入值即可 例：sex='男'// agree: false,sport: [],// fruits: '',// fruits2: [],// hobbies: [],// origintobbies: ["篮球", "足球", "乒乓球", "羽毛球", "桌球"],// age: 0,// name: ''}}}</script>

form表单提交数据

<template><div class="from_box"><form action=""><input type="text"  placeholder="请输入昵称" v-model="formMess.account"><input type="password" placeholder="请输入密码" v-model="formMess.act_pwd"><input type="text" placeholder="请输入手机号" v-model="formMess.phone"></form><span class="but" @click="onSubmit()">提交</span></div>
</template><script>
import axios from 'axios';export default {name: "from",data() {return {formMess:{"account":"","act_pwd":"","phone":""}};},methods: {onSubmit() {/* json格式提交： */// let formData = JSON.stringify(this.formMess);/* formData格式提交： */let formData = new FormData();for(var key in this.formMess){formData.append(key,this.formMess[key]);}axios({method:"post",url:"xxxxxxx",headers: {"Content-Type": "multipart/form-data"},withCredentials:true,data:formData}).then((res)=>{console.log(res);});}}
};
</script><!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="less">
.from_box{form{width:90%;margin: auto;border:.01rem solid gray;display: flex;flex-wrap: wrap;input{width:80%;height:.5rem;margin-bottom: .2rem;border:.01rem solid black;height:.5rem;}}.but{font-size: .14rem;margin-left:5%;}
}
</style>

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