lovecoding
/
Web1020


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
    <style>
        .box1{
            color: red;
        }
        .box2{
            color: blue;
        }
        .active{
            font-size: 40px;
            font-weight: bolder;
            color: green;
        }
    </style>
</head>
<body>
    <div id="app">
        <!-- 默认情况下在vue中标签上属性的值不能使用变量 -->
         <!-- 如果需要使用变量那么需要在属性前方加上v-bind 来声明属性使用的是变量 -->
    
         <div v-bind:class="styleName">hello</div>
        <button @click="changeClass('box1')">box1</button>
        <button @click="changeClass('box2')">box2</button>
        <!-- <img v-bind:src="imgSrc" alt=""> -->
        <!-- <img v-bind:src="imgSrc + '.jpg'" alt=""> -->

        <div v-bind:class="{ active : isActive }">你好</div>
        <div :style="{ fontSize:fontS+'px' }"> 世界 </div>
    </div>
    <script>
        var app = new Vue({
            el:"#app",
            data:{
                styleName:"",
                imgSrc:"./img/1",
                isActive:false,
                fontS:60
            },
            methods: {
                changeClass: function (cName) {
                    this.styleName = cName;
                }
            },
        })
    </script>
</body>
</html>