Vue学习------------（4）v-bind

v-bind作用：将属性的值绑定到data的变量上、methods的方法中、computed的计算属性里

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
    <div id="app">
    	<img v-bind:src="imgURL">   //v-bind语法糖
	<a v-bind:href="aHref">百度一下</a> // :href="aHref" 等同于 v-bind:href="aHref"
    </div>
    <script src="../js/vue.js"></script>
    <script>
        const app=new Vue({
            el : '#app',    
            data : {         
                imgURL : 'http://www.jxnu.edu.cn/_upload/site/00/05/5/logo.png' ,
                aHref : 'http://www.baidu.com'
            }
        })
    </script>
</body>
</html>

　　

v-bind动态绑定class

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    .act {
      color: red;
    }
  </style>
</head>
<body>
    <div id="app">
    	<h2 :class="{act: isAct , line: isLine}">{{message}}</h2>
	<button v-on:click="btnClick">按钮</button>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        const app=new Vue({
            el : '#app',    
            data : {         
                message: '你好啊' ,
                isAct: true ,
                isLine: true
            },
	methods: {
		btnClick: function(){
			this.isAct = !this.isAct
		}
	}
        })
    </script>
</body>
</html>

　　

如果太复杂，可以放入methods或者computed中

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    .act {
      color: red;
    }
  </style>
</head>
<body>
    <div id="app">
    	<h2 :class="{act: isAct , line: isLine}">{{message}}</h2>
    	<h2 :class="getClasses()">{{message}}</h2>
	<button v-on:click="btnClick">按钮</button>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        const app=new Vue({
            el : '#app',    
            data : {         
                message: '你好啊' ,
                isAct: true ,
                isLine: true
            },
	methods: {
		btnClick: function(){
			this.isAct = !this.isAct
		},
		getClasses: function(){
			return {act: this.isAct , line: this.isLine}
		}
	}
        })
    </script>
</body>
</html>

　　

v-bind动态绑定style

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
    <div id="app">
    	<h2 :style="{fontSize: finalSize , color: finalColor }">{{message}}</h2>   //驼峰写法
    	<h2 :style="{'font-size': finalSize , color: finalColor }">{{message}}</h2>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        const app=new Vue({
            el : '#app',    
            data : {         
                message: '你好啊' ,
                finalSize: '100px' ,
                finalColor: 'red'
            }
        })
    </script>
</body>
</html>

　　

posted @ 2021-03-14 11:47  455994206  阅读(71)  评论(0)    收藏  举报