每天CookBook之JavaScript-042

最新推荐文章于 2025-08-06 16:42:26 发布

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最新推荐文章于 2025-08-06 16:42:26 发布

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CC 4.0 BY-SA版权

文章标签： javascript ViewUI

原文链接：http://www.cnblogs.com/4thing/p/5683059.html

本文通过实例展示了如何利用JavaScript的原型链机制为内置类型如String添加自定义方法，并创建了一个名为Tune的对象，该对象包含歌曲标题、艺术家及类别等属性。此外，还介绍了如何为Tune原型添加方法来丰富其功能。

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使用原型链创建对象

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>042</title>
</head>
<body>
    
</body>
<script type="text/javascript">
(function () {
    var str = 'one';
    String.prototype.exclaim = function(){
        if(this.length == 0) return this;
        return this + '!';
    }

    var str2 = 'two';

    console.log(str.exclaim());
    console.log(str2.exclaim());
})(); 

(function () {
    String.prototype.trim = function(){
        return (this.replace(/^[\s\xA0]+/, "").replace(/[\s\xA0]+$/, ""));
    }
})(); 

(function () {
    function Tune (title, aritst) {
        this.concatTitleArtist = function(){
            return title + " " + aritst;
        }
    }s

    var happySongs = new Tune("Putting on the Ritz", "Ella Fitzgerald");
    Tune.prototype.addCategory = function(categoryName){
        this.category = categoryName;
    }

    happySongs.addCategory("Swing");
    var song = "Title and artist: " + happySongs.concatTitleArtist() + " Category: " + happySongs.category;
    console.log(song); 
})(); 
</script>
</html>

转载于:https://www.cnblogs.com/4thing/p/5683059.html