Vue.js实现的计算器功能完整示例
这篇文章主要介绍了Vue.js实现的计算器功能,结合完整实例形式分析了vue.js响应鼠标事件实现基本的数值运算相关操作技巧,可实现四则运算及乘方、开方等功能,需要的朋友可以参考下，本文实例讲述了Vue.js实现的计算器功能。分享给大家供大家参考，具体如下：
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" > <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>@charset "utf-8";
body, ul, dl, dd, dt, ol, li, p, h1, h2, h3, h4, h5, h6, textarea, form, select, fieldset, table, td, div, input {
margin: 0;
padding: 0;
-webkit-text-size-adjust: none
}
h1, h2, h3, h4, h5, h6 {
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;
}
3. 使用本站HTML/CSS/JS在线运行测试工具：http://tools.jb51.net/code/HtmlJsRun，可得到如下测试运行效果：
4. 使用时记得改下css路径,在html中引入vue
5. 博主技术有限,正负号部分功能还有问题待完善.计算器还有一些未知的小Bug,感兴趣的读者可以在这个基础上进行扩展。
原文地址：https://www.jb51.net/article/143623.htm
PS：这里再为大家推荐几款计算工具供大家参考：
在线数学表达式简单转换/计算工具：
http://tools.jb51.net/jisuanqi/exp_jisuanqi
在线一元函数（方程）求解计算工具：
http://tools.jb51.net/jisuanqi/equ_jisuanqi
科学计算器在线使用_高级计算器在线计算：
http://tools.jb51.net/jisuanqi/jsqkexue
在线计算器_标准计算器：
http://tools.jb51.net/jisuanqi/jsq
希望本文所述对大家vue.js程序设计有所帮助。
