使用Vue.js怎么实现一个计算器功能？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
1. HTML部分代码
<!DOCTYPE html> <html lang="en"> <head> <link rel="stylesheet" type="text/css" href="css/css.css" rel="external nofollow" > <script type="text/javascript" src="https://cdn.bootcss.com/vue/2.5.16/vue.min.js"></script> <meta charset="UTF-8"> <title>my-calculator</title> </head> <body> <div id="calculator"> <!--显示框--> <input-box v-bind:input-show="inputShow"> </input-box> <btn-list> <div @click="clearValue()" class=" btn-30 btn-radius color-red clear-marginleft">C</div> <div class=" btn-30 btn-radius color-blue">+/-</div> <div @click="inputValue('%')" class=" btn-30 btn-radius color-blue">%</div> <div @click="backValue()" class=" btn-70 btn-radius color-red font-14">←</div> <div @click="inputValue('7')" class=" btn-30 btn-radius clear-marginleft">7</div> <div @click="inputValue('8')" class=" btn-30 btn-radius">8</div> <div @click="inputValue('9')" class=" btn-30 btn-radius">9</div> <div @click="squareValue()" class=" btn-30 btn-radius color-blue font-14">ײ</div> <div @click="radicalValue()" class=" btn-30 btn-radius color-blue font-12">√</div> <div @click="inputValue('4')" class=" btn-30 btn-radius clear-marginleft">4</div> <div @click="inputValue('5')" class=" btn-30 btn-radius">5</div> <div @click="inputValue('6')" class=" btn-30 btn-radius">6</div> <div @click="inputValue('×')" class=" btn-30 btn-radius color-blue font-14">×</div> <div @click="inputValue('÷')" class=" btn-30 btn-radius color-blue font-12">÷</div> <div @click="inputValue('1')" class=" btn-30 btn-radius clear-marginleft">1</div> <div @click="inputValue('2')" class=" btn-30 btn-radius">2</div> <div @click="inputValue('3')" class=" btn-30 btn-radius">3</div> <div @click="inputValue('+')" class=" btn-30 btn-radius color-blue font-14">+</div> <div @click="inputValue('-')" class=" btn-30 btn-radius color-blue font-14">-</div> <div @click="inputValue('0')" class=" btn-70 btn-radius clear-marginleft">0</div> <div @click="inputValue('.')" class=" btn-30 btn-radius">.</div> <div @click="calValue()" class=" btn-70 btn-radius color-red font-14">=</div> </btn-list> </div> <script> var calculator = new Vue({ el:'#calculator', data:{ inputShow:{ value:'0' } }, components:{ 'input-box':{ props:['inputShow'], computed: { value:function () { return this.inputShow.value } }, template:'<input id="input-box" type="text" size="21" maxlength="21" v-model="value" readonly="readonly">' }, 'btn-list':{ template:'<div id="btn-list"><slot></slot></div>' } }, methods:{ inputValue(param){ if(Object.prototype.toString.call(this.inputShow.value) == "[object Number]"){ //判断输入框内容是否为数字类型 this.inputShow.value = "0"; //数字类型说明是上个计算结果,清空内容 } var str ='' + this.inputShow.value; //输入内容时,将输入框内容转为字符串类型 var len = str.length; var arr = ["+","-","×","÷"]; var num = (''+parseFloat(str.split('').reverse().join(''))).split('').reverse().join(''); //parseInt(str.split('').reverse().join('')))是获取输入框内最后一串数字,再反转回来 ,num为输入框内最后一串数字 var nlen = num.length; if((num!= '0' && param != '.')|| (param == '.'&& num.indexOf(".")==-1)){ //输入框内最后一串数字不为0时拼接字符串 if(arr.indexOf(str.charAt(len-1)) != -1 && arr.indexOf(param) != -1){ //若一开始输入内容为运算符,输入无效 return; } this.inputShow.value += param; //拼接输入内容 }else{ arr.push("%"); if(param == '.'){ //若num中已有小数点,输入内容为小数点,视为无效 return; }else if(!(arr.indexOf(param) != -1)){ //判断输入框内最后一个字符不为运算符 this.inputShow.value =str.substring(0,str.length-nlen) + param; //输入框内最后一串数字为0时,删除0拼接 } } }, clearValue(){ //清空输入框内容 this.inputShow.value = '0'; }, calValue(){ //计算结果 var str = this.inputShow.value; str = str.replace('×','*').replace('÷','/').replace('%','*0.01'); //替换运算符 try{ this.inputShow.value = eval(str); //若用户输入内容不符合运算规则,不计算 }catch(error){ return; } }, squareValue(){ //平方计算 var str = this.inputShow.value; this.inputShow.value = Math.pow(eval(str),2) }, radicalValue(){ //开根号计算 var str = this.inputShow.value; this.inputShow.value = Math.sqrt(eval(str)); }, backValue(){ //删除键,删除单个字符 var str = this.inputShow.value; if(str.length == 1){ this.inputShow.value = "0"; }else{ this.inputShow.value = str.slice(0,str.length-1); } }, /*oppositeValue(){ //正负号取值 var str = this.inputShow.value; var num = (''+parseInt(str.split('').reverse().join(''))).split('').reverse().join(''); //获取输入框内最后遗传数字 var nlen = num.length; debugger; if(!isNaN( parseInt(str.charAt(str.length-1))) && num != 0){ //当输入框末位字符为数字且最后一串数字不为0时,取正负 this.inputShow.value = str.substring(0,str.length-nlen)+`(-${num})`; } }*/ } }) </script> </body> </html>
2. CSS部分代码
@charset "utf-8";
body, ul, dl, dd, dt, ol, li, p, h2, h3, h4, h5, h6, h7, textarea, form, select, fieldset, table, td, div, input{margin:0;padding:0;-webkit-text-size-adjust:none}
h2, h3, h4, h5, h6, h7{font-size:12px;font-weight:normal}
body>div{margin:0 auto}
div{text-align:left}
a img{border:0}
body{color:#333;text-align:center;font:12px "微软雅黑";}
ul, ol, li{list-style-type:none;vertical-align:0}
a{outline-style:none;color:#535353;text-decoration:none}
a:hover{color:#D40000;text-decoration:none}
.clear{height:0;overflow:hidden;clear:both}
/* calculator */
#calculator{width:200px;height:245px;padding:10px;border:1px solid #e5e5e5;background:#f8f8f8;-moz-border-radius:3px;-webkit-border-radius:3px;border-radius:3px;box-shadow:0px 0px 10px #f2f2f2;-moz-box-shadow:0px 0px 10px #f2f2f2;-webkit-box-shadow:0px 0px 10px #f2f2f2;margin:40px auto 0 auto;}
#calculator #input-box{margin:0;width:187px;padding:9px 5px;height:14px;border:1px solid #e5e5e5;border-radius:3px;-webkit-border-radius:3px;-moz-border-radius:3px;background:#FFF;text-align:right;line-height:14px;font-size:12px;font-family:Verdana, Geneva, sans-serif;color:#666;outline:none; text-transform:uppercase;}
#calculator #btn-list{width:200px;overflow:hidden;}
#calculator #btn-list .btn-radius{border-radius:2px;-webkit-border-radius:2px;-moz-border-radius:2px;border:1px solid #e5e5e5;background:-webkit-gradient(linear, 0 0, 0 100%, from(#f7f7f7), to(#ebebeb));background:-moz-linear-gradient(top, #f7f7f7,#ebebeb);filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#f7f7f7,endColorstr=#ebebeb,grandientType=1);line-height:29px;text-align:center;text-shadow:0px 1px 1px #FFF;font-weight:bold;font-family:Verdana, Geneva, sans-serif;color:#666;float:left;margin-left:11px;margin-top:11px;font-size:12px;cursor:pointer;}
#calculator #btn-list .btn-radius:active{background:#ffffff;}
#calculator #btn-list .clear-marginleft{margin-left:0;}
#calculator #btn-list .font-14{font-size:14px;}
#calculator #btn-list .color-red{color:#ff5050}
#calculator #btn-list .color-blue{color:#00b4ff}
#calculator #btn-list .btn-30{width:29px;height:29px;}
#calculator #btn-list .btn-70{width:70px;height:29px;}关于使用Vue.js怎么实现一个计算器功能问题的解答就分享到这里了，希望以上内容可以对大家有一定的帮助，如果你还有很多疑惑没有解开，可以关注亿速云行业资讯频道了解更多相关知识。
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