Vue v-bind 指令

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Jihongchang（讨论 | 贡献）2023年6月9日 (五) 03:35的版本
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https://www.bilibili.com/video/BV12J411m7MG/?p=13

设置元素的属性（比如：src，title，class）

<div id="app">
  <img v-bind:src="imgSrc">
  <img v-bind:title="imgTitle + '!!!'">
  <img class="active">
  <img v-bind:class="isActive?'active':''">
  <img v-bind:class="{active:isActive}">

  <img :src="imgSrc">
  <img :title="imgTitle + '!!!'">
  <img :class="isActive?'active':''">
  <img :class="{active:isActive}">
</div>

var app = new Vue({
  el:"#app",
  data:{
    imgSrc:"图片地址",
    imgTitle:"hello world",
    isActive:false
  }
})

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>v-bind指令</title>
    <style>
        .active {
            border: 1px solid red;
        }
    </style>
</head>

<body>
    <div id="app">
        <img v-bind:src="imgSrc" alt="">
        <br>

        <img :src="imgSrc" alt="" :title="imgTitle+'!!!'" 
          :class="isActive?'active':''" @click="toggleActive">

        <img :src="imgSrc" alt="" :title="imgTitle+'!!!'" 
          :class="{active:isActive}" @click="toggleActive">
    </div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el: "#app",
            data: {
                imgSrc:"https://www.jihongchang.top/resources/assets/logo.png",
                imgTitle:"hello world",
                isActive: false
            },
            methods: {
                toggleActive:function(){
                    this.isActive = !this.isActive;
                }
            }
        })
    </script>
</body>
</html>
  • v-bind 指令的作用是：为元素绑定属性
  • 完整的写法是 v-bind:属性名
  • 简写的话可以直接省略 v-bind，只保留 :属性名
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