一個小東西，給自己留作備份用的
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>蒲式耳, 磅 換算成公斤和噸</title> <style> #box1{ margin-bottom: 50px; } .des{ font-size: 13px; color: #666; margin: 10px 0;} </style> </head> <body> <div id="box1"> <input type="text" placeholder="請輸入蒲式耳" id="txt"> <button id="btn">蒲式耳轉化為千克和噸</button> <div class="des"> 1蒲式耳 = 27.216公斤 </div> <div id="content"></div> </div> <div> <input type="text" placeholder="請輸入磅" id="txt2"> <button id="btn2">磅轉化為千克和噸</button> <div class="des"> 1磅 = 0.45359237公斤 </div> <div id="content2"></div> </div> <script> window.onload = function () { let btn = document.getElementById('btn') let txt = document.getElementById('txt') let content = document.getElementById('content') btn.onclick = function() { let num = txt.value * 27.216 content.innerHTML = txt.value + '蒲式耳' + ' = ' + num + '公斤' + ' = ' + num * 2 + '斤' + ' = ' + num / 1000 + '噸' } let btn2 = document.getElementById('btn2') let txt2 = document.getElementById('txt2') let content2 = document.getElementById('content2') btn2.onclick = function() { let num = txt2.value * 0.45359237 content2.innerHTML = txt2.value + '磅' + ' = ' + num + '公斤' + ' = ' + num * 2 + '斤' + ' = ' + num / 1000 + '噸' } } </script> </body> </html>