Vue 制作简易计算器

时间：2022-02-09 06:31:06
<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>简易计算器</title>

<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>

</head>

<body>

<div id="app">

  <input type="text" v-model="n1">

    <select v-model="opt">

        <option value="+">+</option>

        <option value="-">-</option>

        <option value="*">*</option>

        <option value="/">/</option>

    </select>

  <input type="text" v-model="n2">

  <input type="button" @click="calc1" value="=">

  <input type="text" v-model="result">

</div>

<script>

var vm = new Vue({

  el: '#app',

  data: {

   n1:0,

   n2:0,

   opt: '+',

   result: 0,

  },

  methods:{

      calc(){

        switch(this.opt){

                case '+':

                this.result = parseInt(this.n1) + parseInt(this.n2);break;

                 case '-':

                this.result = parseInt(this.n1) - parseInt(this.n2);break;

                 case '*':

                this.result = parseInt(this.n1) * parseInt(this.n2);break;

                 case '/':

                this.result = parseInt(this.n1) / parseInt(this.n2);break;

        }

    },

      calc1(){

      var codeStr = 'parseInt(this.n1) ' + this.opt + 'parseInt(this.n2)';

        this.result =eval(codeStr);

      }

  }

})

</script>

</body>

</html>

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