# jQuery應用 - BMI計算機 ## BMI.html ```htmlmixed= <!doctype html> <html lang="zh-TW"> <head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <!-- Bootstrap CSS --> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous"> <!-- 引用自已定義的CSS --> <link rel="stylesheet" href="./css/bmi.css"> <title>BMI 計算機</title> </head> <body> <div class="container"> <!-- 標題 --> <div class="row"> <div class="col"> <div class="jumbotron"> <h1 class="display-4">BMI 計算機</h1> </div> </div> </div> <!-- 表單 --> <div class="row"> <div class="col"> <form> <div class="form-group row"> <label for="inputHeight" class="col-sm-2 col-form-label">身高(cm)</label> <div class="col-sm-10"> <input type="number" class="form-control" id="inputHeight" placeholder="請輸入身高" value="185"> </div> </div> <div class="form-group row"> <label for="inputWeight" class="col-sm-2 col-form-label">體重(kg)</label> <div class="col-sm-10"> <input type="number" class="form-control" id="inputWeight" placeholder="請輸入體重" value="85"> </div> </div> <div class="form-group row"> <div class="col-sm-10"> <button type="button" class="btn btn-primary">計算</button> </div> </div> <div class="form-group row"> <label for="outputBMI" class="col-sm-2 col-form-label">BMI</label> <div class="col-sm-10"> <input type="number" readonly class="form-control-plaintext" id="outputBMI" placeholder="BMI的值"> </div> </div> </form> </div> </div> <div class="row"> <div class="col"> <footer> copyright &copy; 2020 前端程式設計 by kChen </footer> </div> </div> </div> <!-- Optional JavaScript --> <!-- jQuery first, then Popper.js, then Bootstrap JS --> <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"> </script> <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"> </script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous"> </script> <!-- 引用自己寫的 js --> <script src="./js/bmi.js"></script> </body> </html> ``` ## BMI.css ```css= .jumbotron { background-color: #334ddf; color: #FFFFFF; } footer { text-align: center; color: #666; border-top: 1px solid; padding-top: 30px; } ``` ## BMI.js ```javascript= $(() => { $('button').on('click', () => { let h = +$('#inputHeight').val() let w = +$('#inputWeight').val() let hh = h / 100 let bmi = w / (hh * hh) $('#outputBMI').val(bmi) }) }) ``` ###### tags: `前端程式設計` `108-2`