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vuejs修改背景色的方法：1、在index.html中引入公用的css樣式；2、通過添加“beforeCreate () {…}”代碼修改單個(gè)組件的背景色即可。
本文操作環(huán)境：windows7系統(tǒng)、vue2.5.17版、Dell G3電腦。
vuejs怎么修改背景色？
Vue實(shí)現(xiàn)背景更換顏色操作
如下所示：
<!-- 分頁(yè)上下頁(yè)改變背景圖效果 --> <!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; } p{ width: 500px;height: 500px; } </style> </head> <body > <p 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" >上一頁(yè)</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">下一頁(yè)</a> </li> </ul> </p> <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},$,${a})` } } }) </script> </body> </html>
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title>自定義指令實(shí)現(xiàn)隨機(jī)背景</title> <style type="text/css" media="screen"> #app{ width: 999px; height: 999px; } </style> </head> <body> <h3>自定義指令</h3> <p id="app" v-change-background-color="myBgColor"> <h3 > <input type="text" v-model="myBgColor" placeholder="請(qǐng)輸入16進(jìn)制顏色"> </h3> </p> <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},$,$)` } }, directives: { changeBackgroundColor: { bind: function(el, bindings) { //el:指定綁定dom元素 h3dom對(duì)象 //bindings:自定義指令對(duì)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},$,${a})`; console.log("綁定成功"); }, update: function(el, bindings) { console.log('已更新數(shù)據(jù)'); 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},$,${a})` }, //更新數(shù)據(jù) } } }); </script> </body> </html>
補(bǔ)充知識(shí)：vue統(tǒng)一設(shè)置了背景色，單獨(dú)改變某一頁(yè)的背景色
有時(shí)我們會(huì)遇到單獨(dú)改變某個(gè)組件的背景填充色，而我們已經(jīng)在index.html中引入了公用的css樣式（body中設(shè)置了背景色），由于單個(gè)組件沒有body標(biāo)簽，于是要修改單個(gè)組件的背景色只需添加如下代碼即可。
beforeCreate () { document.querySelector('body').setAttribute('style', 'margin: 0 auto; width: 100%; max-width: 750px;min-width: 300px; background:#171b2a; overflow-x: hidden;height: 100%;'); }
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