我需要幫助修復我的html和java腳本程式碼

<p>我想做一個地方，在那裡輸入你的下一個生日，頁面就會變成一個視窗。提醒你還有幾天就是你的生日了。當我運行代碼時，在我輸入生日之前，警報顯示NaN，這意味著不是一個數字。我想讓它工作後，我鍵入生日後，我點擊提交。這是我寫的程式碼:</p> <p>` </p> <pre class="brush:php;toolbar:false;"><input type="submit" value="Submit"> </form> <script> let date_1 = new Date(document.getElementById("bday").value); let date_2 = new Date(); let difference = date_1.getTime() - date_2.getTime(); let TotalDays = Math.ceil(difference / (1000 * 3600 * 24)); window.alert(TotalDays); </script> </body>`</pre> <p><br /></p>

P粉201448898568 天前644

<!DOCTYPE html> <html> <head> <title>Birthday Countdown</title> </head> <body> <form onsubmit="calculateDaysLeft(event)"> <label for="bday">Enter your birthday:</label> <input type="date" id="bday" name="bday" required> <input type="submit" value="Submit"> </form> <script> function calculateDaysLeft(event) { event.preventDefault(); // Prevent form submission to avoid page reload // Get the user's birthday from the input field let userBirthday = new Date(document.getElementById("bday").value); // Get the current date let currentDate = new Date(); // Calculate the difference in milliseconds let difference = userBirthday.getTime() - currentDate.getTime(); // Calculate the difference in days and show the alert let totalDays = Math.ceil(difference / (1000 * 3600 * 24)); window.alert(`There are ${totalDays} days left until your birthday!`); } </script> </body> </html>

我需要幫助修復我的html和java腳本程式碼

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