PHP前端开发

如何在JavaScript中向对象添加属性和方法?

百变鹏仔 3个月前 (09-22) #HTML
文章标签 中向

要向 JavaScript 中的对象添加属性和方法,请使用 prototype 属性。

示例

您可以尝试运行以下代码来了解如何使用原型 -

<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>