ES6 Boolean属性Prototype
ES6 Boolean属性Prototype
prototype 属性允许您向任何对象(数字、布尔值、字符串和日期等)添加属性和方法。
请注意-prototype是一个全局属性，几乎所有对象都可用。
使用以下语法创建一个布尔原型。
object.prototype.name = value
例子
<html>
<head>
<title>User-defined objects</title>
<script type = "text/javascript">
function book(title, author){
this.title = title;
this.author = author;
}
</script>
</head>
<body>
<script type = "text/javascript">
var myBook = new book("Perl", "Tom");
book.prototype.price = null;
myBook.price = 100;
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>
输出
Book title is : Perl Book author is : Tom Book price is : 100