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" >
  <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">×2</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(‘ב)" 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(‘ב,‘*‘).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, 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:

Vue.js实现的计算器功能完整示例

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。

Vue.js实现的计算器功能完整示例

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