<script src="/UploadFiles/2021-04-02/vue.min.js">

2. css部分：


body {
 background: linear-gradient(to right, #85D8CE, #085078);
}
#app {
 font-family: 'Avenir', Helvetica, Arial, sans-serif;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 text-align: center;
 color: #2c3e50;
 display: flex;
 flex-wrap: wrap;
 justify-content: center;
 align-item: center;
}
.calculator {
 width: 440px;
 padding: 20px;
 border-radius: 5px;
 margin: 20px auto;
 font-size: 16px;
 background-color: #333333;
}
.input {
 width: 420px;
 height: 50px;
 border-radius: 0px;
 border: 1px solid black;
 background-color: #333333;
 color: #d9d9d9;
 padding: 0 5px 0 5px;
 margin: 0 0px 10px 0px;
 font-size: 30px;
}
.input:focus,
.input:active {
 border-color: #03a9f4;
 box-shadow: 0 0 4px #03A9F4;
 outline: none 0;
}
.button {
 margin: 3px;
 width: 63px;
 border: 1px solid #0d0d0d;
 height: 30px;
 border-radius: 4px;
 color: #d9d9d9;
 background-color: #1a1a1a;
 cursor: pointer;
 outline: none;
}
.mode {
 display: flex;
 flex-wrap: wrap;
 justify-content: space-evenly;
}
.equal-sign {
 background-color: green;
 width: 133px;
}
.toggle-button {
 border: none;
 background-color: #333333;
 cursor: pointer;
 outline: none;
 font-size: 1rem;
 color: #fff;
 text-shadow: -1px -1px 0 rgba(0, 0, 0, 0.35);
}
p {
 margin-top: 0;
}
button::-moz-focus-inner {
 border-color: transparent;
}




3. js部分：


let app = new Vue({
 el: '#app',
 data () {
  return{ 
   current: '',
   changeMode: true
  }
 },
 methods: {
  press: function (event) {
   let me = this
   let key = event.target.textContent
   if (
    key != '=' && 
    key != 'C' &&
    key != '*' &&
    key != '/' &&
    key != '√' &&
    key != "x 2" &&
    key != "%" &&
    key != "<=" && 
    key != "±" && 
    key != "sin" && 
    key != "cos" && 
    key != "tan" && 
    key != "log" && 
    key != "ln" && 
    key != "x^" && 
    key != "x !" && 
    key != "π" && 
    key != "e" && 
    key != "rad" && 
    key != "°"
   ) {
    me.current += key
   } else if (key === '=') {
    if ((me.current).indexOf('^') > -1) {
     let base = (me.current).slice(0, (me.current).indexOf('^'))
     let exponent = (me.current).slice((me.current).indexOf('^') + 1)
     me.current = eval('Math.pow(' + base + ',' + exponent + ')')
    } else {
     me.current = eval(me.current)
    }
   } else if (key === 'C') {
    me.current = ''
   } else if (key === '*') {
    me.current += '*'
   } else if (key === '/') {
    me.current += '/'
   } else if (key === '+') {
    me.current += '+'
   } else if (key === '-') {
    me.current += '-'
   } else if (key === '±') {
    if ((me.current).charAt(0) === '-') {
     me.current = (me.current).slice(1)
    } else {
     me.current = '-' + me.current
    }
   } else if (key === '<=') {
    me.current = me.current.substring(0, me.current.length - 1)
   } else if (key === '%') {
    me.current = me.current / 100
   } else if (key === 'π') {
    me.current = me.current * Math.PI
   } else if (key === 'x 2') {
    me.current = eval(me.current * me.current)
   } else if (key === '√') {
    me.current = Math.sqrt(me.current)
   } else if (key === 'sin') {
    me.current = Math.sin(me.current)
   } else if (key === 'cos') {
    me.current = Math.cos(me.current)
   } else if (key === 'tan') {
    me.current = Math.tan(me.current)
   } else if (key === 'log') {
    me.current = Math.log10(me.current)
   } else if (key === 'ln') {
    me.current = Math.log(me.current)
   } else if (key === 'x^') {
    me.current += '^'
   } else if (key === 'x !') {
    let number = 1
    if (me.current === 0) {
     me.current = '1'
    } else if (me.current < 0) {
     me.current = NaN
    } else {
     let number = 1
     for (let i = me.current; i > 0; i--) {
      number *= i
     }
     me.current = number
    }
   } else if (key === 'e') {
    me.current = Math.exp(me.current)
   } else if (key === 'rad') {
    me.current = me.current * (Math.PI / 180)
   } else if (key === '°') {
    me.current = me.current * (180 / Math.PI)
   }
  },
  changeModeEvent: function() {
   let me = this
   me.changeMode = !me.changeMode
  }
 }
})




完整实例代码如下：


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>www.jb51.net vue.js计算器</title>
<style>
body {
 background: linear-gradient(to right, #85D8CE, #085078);
}
#app {
 font-family: 'Avenir', Helvetica, Arial, sans-serif;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 text-align: center;
 color: #2c3e50;
 display: flex;
 flex-wrap: wrap;
 justify-content: center;
 align-item: center;
}
.calculator {
 width: 440px;
 padding: 20px;
 border-radius: 5px;
 margin: 20px auto;
 font-size: 16px;
 background-color: #333333;
}
.input {
 width: 420px;
 height: 50px;
 border-radius: 0px;
 border: 1px solid black;
 background-color: #333333;
 color: #d9d9d9;
 padding: 0 5px 0 5px;
 margin: 0 0px 10px 0px;
 font-size: 30px;
}
.input:focus,
.input:active {
 border-color: #03a9f4;
 box-shadow: 0 0 4px #03A9F4;
 outline: none 0;
}
.button {
 margin: 3px;
 width: 63px;
 border: 1px solid #0d0d0d;
 height: 30px;
 border-radius: 4px;
 color: #d9d9d9;
 background-color: #1a1a1a;
 cursor: pointer;
 outline: none;
}
.mode {
 display: flex;
 flex-wrap: wrap;
 justify-content: space-evenly;
}
.equal-sign {
 background-color: green;
 width: 133px;
}
.toggle-button {
 border: none;
 background-color: #333333;
 cursor: pointer;
 outline: none;
 font-size: 1rem;
 color: #fff;
 text-shadow: -1px -1px 0 rgba(0, 0, 0, 0.35);
}
p {
 margin-top: 0;
}
button::-moz-focus-inner {
 border-color: transparent;
}
</style>
</head>
<body>
<script src="/UploadFiles/2021-04-02/vue.min.js">

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：

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。