要為 JavaScript 中的物件新增屬性和方法，請使用 prototype 屬性。
您可以嘗試執行以下程式碼來了解如何使用原型 -
<html>
<head>
<title>JavaScript prototype property</title>
<script>
function book(title, author) {
this.title = title;
this.author = author;
}
</script>
</head>
<body>
<script>
var myBook = new book("Amit", "Java");
book.prototype.price = null;
myBook.price = 500;
document.write("Book title is : " + myBook.title + "<br>");
document.write("Book author is : " + myBook.author + "<br>");
document.write("Book price is : " + myBook.price + "<br>");
</script>
</body>
</html>以上是如何在JavaScript中為物件新增屬性和方法？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
