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- <html lang="en"><head>
- <meta charset="UTF-8">
- <title>Document</title>
- <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
- <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
- <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
- <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
- <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
- <style>
- .btn{
- padding:4px 24px;
- }
- #result{
- width:245px;
- margin-left:15px;
- margin-top:15px;
- margin-bottom:10px;
- }
- </style>
- </head>
- <body>
- <div class="container">
- <div class="row">
- <input type="text" class="form-control" value="" id="result" data-operation="" data-total="0" data-current="">
- <p> </p>
- </div>
- <div class="row">
- <div class="form-group col-lg-12">
- <input type="button" class="btn btn-default" value="7">
- <input type="button" class="btn btn-default" value="8">
- <input type="button" class="btn btn-default" value="9">
- <input type="button" class="btn btn-primary" value="/">
- </div>
- <div class="form-group col-lg-12">
- <input type="button" class="btn btn-default" value="4">
- <input type="button" class="btn btn-default" value="5">
- <input type="button" class="btn btn-default" value="6">
- <input type="button" class="btn btn-primary" value="x">
- </div>
- <div class="form-group col-lg-12">
- <input type="button" class="btn btn-default" value="1">
- <input type="button" class="btn btn-default" value="2">
- <input type="button" class="btn btn-default" value="3">
- <input type="button" class="btn btn-primary" value="-">
- </div>
- <div class="form-group col-lg-12">
- <input type="button" class="btn btn-default" value="0">
- <input type="button" class="btn btn-primary" value=".">
- <input type="button" class="btn btn-danger" value="=">
- <input type="button" class="btn btn-primary" value="+">
- </div>
- </div>
- </div>
- <script>
- let _btns = document.getElementsByClassName('btn-default');
- for(item of _btns){
- item.addEventListener('click', (e) => {
- console.log(e.target.value);
- let input = document.getElementsByClassName('form-control')[0];
- if(isNaN(input.value)){
- input.dataset.current += e.target.value;
- }
- input.value += e.target.value;
- });
- }
- let _ops = document.getElementsByClassName('btn-primary');
- for(item of _ops){
- item.addEventListener('click', (e) => {
- let input = document.getElementsByClassName('form-control')[0];
- if(input.dataset.operation != ''){
- switch(input.dataset.operation){
- case '+': input.value = parseInt(input.dataset.total) + parseInt(input.dataset.current); break;
- case '-': input.value = parseInt(input.dataset.total) - parseInt(input.dataset.current); break;
- case '/': input.value = parseInt(input.dataset.total) / parseInt(input.dataset.current); break;
- case 'x': input.value = parseInt(input.dataset.total) * parseInt(input.dataset.current); break;
- default: break;
- }
- input.dataset.current = "";
- input.dataset.operation = e.target.value;
- input.dataset.total = input.value;
- }
- else {
- input.dataset.total = input.value;
- }
- input.value = input.value + e.target.value;
- input.dataset.operation = e.target.value;
- // if(!isNaN(input.value)){
- // input.value += e.target.value;
- // }
- });
- }
- </script>
- </body>
- </html>
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