<!DOCTYPE html> <html> <body> <h1>Window 对象</h1> <h2>prompt() 方法</h2> <p>单击按钮,会询问您最喜欢的饮料。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { let text; let favDrink = prompt("您最喜欢喝什么?", "可口可乐"); switch(favDrink) { case "可口可乐": text = "很棒的选择。可口可乐对您的灵魂有益。"; break; case "百事可乐": text = "百事可乐也是我的最爱!"; break; case "雪碧": text = "真的吗?您确定雪碧是您的最爱吗?"; break; default: text = "我从没听说过那个.."; } document.getElementById("demo").innerHTML = text; } </script> </body> </html>