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Vue实现背景更换颜色操作

ShanCW 人气:0

本文着重讲解了Vue实现背景更换颜色操作,值得借鉴,相信能够帮助到您。我们一起来阅读吧

如下所示:

<!-- 分页上下页改变背景图效果 -->
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title></title>
	<link rel="stylesheet" href="">
	<script type="text/javascript" src="../node_modules/vue/dist/vue.js"></script>
	<style type="text/css" media="screen">
		.page{
			list-style: none;
		}
		.page>li{
			float: left;
			margin-left: 10px;
		}
		.page>li>a{
			text-decoration: none;
		}
		.active{
			color: red;
			text-decoration: display;
		}
		div{
			width: 500px;height: 500px;
		}
	</style>
</head>
<body >
	<div id="app" v-bind:style="{backgroundColor:bgCol}">
		<ul class="page">
			<li> 
				<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" v-on:click="decrease" >上一页</a> 
			</li>
			<li v-for="n in totalPage">
				<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" v-bind:class="n==activeNum?'active':''">{{n}}</a>
			</li>
			<li>
				<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" @click="increase">下一页</a> 
			</li>
		</ul>
	</div>
	<script type="text/javascript">
		var exampleData={
			
			//msg:"Hello Vue",
			bgCol:"#DB8623FF",
			totalPage:10,
			
			activeNum:3,
		}
		var app = new Vue({
			el:'#app',
			data:exampleData,
			methods:{
				decrease:function(){
					this.activeNum==1?'':this.activeNum-=1;
					
					this.bgCol=this.getRandom();

				},
				increase:function(){
					this.activeNum==10?'':this.activeNum+=1;
					this.bgCol=this.getRandom();
				},
				getRandom:function(){
					var r=Math.floor(Math.random()*256);
					var g=Math.floor(Math.random()*256);
					var b=Math.floor(Math.random()*256);
					var a=Math.random().toFixed(1);
					return `rgba(${r},${g},${b},${a})`
				}
			}
		})
	</script>
</body>
</html>

<!DOCTYPE html>
<html>

<head lang="en">
 <meta charset="UTF-8">
 <title>自定义指令实现随机背景</title>
 <style type="text/css" media="screen">
  #app{
  width: 999px;
  height: 999px;
  }
 </style>
</head>
<body>
 <h3>自定义指令</h3>
 <div id="app" v-change-background-color="myBgColor">
 <h3 >
 <input type="text" v-model="myBgColor" placeholder="请输入16进制颜色">
 </h3>
 </div>
 <script src="../node_modules//vue/dist/vue.js"></script>
 <script>
 var exampleData = {
  myBgColor: "#5FCA34",
 };
 new Vue({
  el: "#app",
  data: exampleData,
  methods:{
  	 getRandom:function(){
			var r=Math.floor(Math.random()*256);
			var g=Math.floor(Math.random()*256);
			var b=Math.floor(Math.random()*256);
			var a=Math.random().toFixed(1);
			return `rgba(${r},${g},${b},${b})`
    }
  },
  directives: {
   changeBackgroundColor: {
    bind: function(el, bindings) {
     //el:指定绑定dom元素 h3dom对象
     //bindings:自定义指令对象
     //v-change-background-color="myBgColor"
     //bindings.value;=="#ff0000"
					var r=Math.floor(Math.random()*256);
					var g=Math.floor(Math.random()*256);
					var b=Math.floor(Math.random()*256);
					var a=Math.random().toFixed(1);

     el.style.backgroundColor =`rgba(${r},${g},${b},${a})`;
     console.log("绑定成功");
    },
    update: function(el, bindings) {
     console.log('已更新数据');
     var r=Math.floor(Math.random()*256);
					var g=Math.floor(Math.random()*256);
					var b=Math.floor(Math.random()*256);
					var a=Math.random().toFixed(1);
     el.style.background = `rgba(${r},${g},${b},${a})`
    }, //更新数据

   }
  }
 });
 </script>
</body>

</html>

补充知识:vue统一设置了背景色,单独改变某一页的背景色

有时我们会遇到单独改变某个组件的背景填充色,而我们已经在index.html中引入了公用的css样式(body中设置了背景色),由于单个组件没有body标签,于是要修改单个组件的背景色只需添加如下代码即可。

beforeCreate () {
 document.querySelector('body').setAttribute('style', 'margin: 0 auto; width: 100%; max-width: 750px;min-width: 300px; background:#171b2a; overflow-x: hidden;height: 100%;');
}

以上这篇Vue实现背景更换颜色操作就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。

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