本文实例讲述了JS匿名函数类生成方式。分享给大家供大家参考,具体如下:
<script type="text/javascript">var Book = (function() { // 私有静态属性 var numOfBooks = 0; // 私有静态方法 function checkIsbn(isbn) {if(isbn == undefined || typeof isbn != "string") { return false;}return true; } // 返回构造函数 return function(newIsbn, newTitle, newAuthor) { // implements Publication// 私有属性var isbn, title, author;// 特权方法this.getIsbn = function() { return isbn;};this.setIsbn = function(newIsbn) { if(!checkIsbn(newIsbn)) throw new Error("Book: Invalid ISBN."); isbn = newIsbn;};this.getTitle = function() { return title;};this.setTitle = function(newTitle) { title = newTitle || "No title specified";};this.getAuthor = function() { return author;};this.setAuthor = function(newAuthor) { author = newAuthor || "No author specified";};// 控制对象数目,构造函数numOfBooks++; // Keep track of how many Books have been instantiated // with the private static attribute.if(numOfBooks > 5) throw new Error("Book: Only 5 instances of Book can be "+ "created.");this.setIsbn(newIsbn);this.setTitle(newTitle);this.setAuthor(newAuthor); }})();// 公有静态方法Book.convertToTitleCase = function(inputString) { alert("convertToTitleCase");};// 公有非特权方法Book.prototype = { display: function() {alert("isbn:"+this.getIsbn()+" title:"+this.getTitle()+" author:"+this.getAuthor()); }};//var theHobbit = new Book(123, "", "J. R. R. Tolkein"); // 非字符串抛出异常var theHobbit = new Book("1990-78sd-1092", "", "J. R. R. Tolkein");theHobbit.display();//theHobbit.convertToTitleCase(); // Uncaught TypeError: Object #<Object> has no method "convertToTitleCase"Book.convertToTitleCase(); // 输出convertToTitleCasevar theHobbit2 = new Book("1990-78sd-1092", "", "J. R. R. Tolkein");theHobbit2.display();var theHobbit3 = new Book("1990-78sd-1092", "", "J. R. R. Tolkein");theHobbit3.display();var theHobbit4 = new Book("1990-78sd-1092", "", "J. R. R. Tolkein");theHobbit4.display();var theHobbit5 = new Book("1990-78sd-1092", "", "J. R. R. Tolkein");theHobbit5.display();var theHobbit6 = new Book("1990-78sd-1092", "", "J. R. R. Tolkein");theHobbit6.display(); // Uncaught Error: Book: Only 5 instances of Book can be created.</script>
这里已经把js出神入化了,佩服到极致,代码清晰简洁,美观,注释恰到好处。
更多关于JavaScript相关内容可查看本站专题:《JavaScript常用函数技巧汇总》、《javascript面向对象入门教程》、《JavaScript中json操作技巧总结》、《JavaScript切换特效与技巧总结》、《JavaScript查找算法技巧总结》、《JavaScript动画特效与技巧汇总》、《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》、《JavaScript遍历算法与技巧总结》及《JavaScript数学运算用法总结》
希望本文所述对大家JavaScript程序设计有所帮助。