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vue.js如何实现的经典计算器/科学计算器功能
这篇文章主要介绍了vue.js如何实现的经典计算器/科学计算器功能，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
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为什么要使用Vue
Vue是一款友好的、多用途且高性能的JavaScript框架，使用vue可以创建可维护性和可测试性更强的代码库，Vue允许可以将一个网页分割成可复用的组件，每个组件都包含属于自己的HTML、CSS、JavaScript，以用来渲染网页中相应的地方，所以越来越多的前端开发者使用vue。
本文实例讲述了vue.js实现的经典计算器/科学计算器功能。分享给大家供大家参考，具体如下：
1. HTML部分：
Show Advanced Mode ⚈
Show Basic Mode ⚆
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<=
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cos
tan
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log
ln
e
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rad
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x 2
x !
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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：
www.jb51.net vue.js计算器
Show Advanced Mode ⚈
Show Basic Mode ⚆
7
8
9
*
<=
C
4
5
6
/
(
)
1
2
3
-
x 2
±
0
.
%
+
=
sin
cos
tan
x^
<=
C
log
ln
e
°
rad
√
7
8
9
/
x 2
x !
4
5
6
*
(
)
1
2
3
-
%
±
0
.
π
+
=