JS库开发原则
1.保持无侵入式
html代码不必关心你的javascript在干什么。
2.严禁使用Object.prototype
这一条是如此重要以至于它有资格单独成为一条原则，对象是javascript最基本的构建元素，别把他弄乱了。
3.不要过度扩展
对javascript的内建对象的扩展越少越好。别误会，内建javascript对象本身有用的方法很少，你可能觉得有必要增加自己的一两个方法， 但是一两个对一个有创造力（js库）的程序员来说是不够的，停下来，只增加你真正想要的。越少去扩展内建对象，你与其他框架发生冲突的可能性就越少。
4.紧随标准
作为一个js库开发者，你在为javascript代码建立模式，然而模式在编程语言中意味着差劲，记住，关于javascript和DOM新 标准在不停地修订中，如果你打算去“修正”某些东西，那么先看看那些东西是否已经被修正过了。参考一下已有的解决方案。一旦跟随标准，请别掉队（比如，在 forEach方法中一个参数也不要漏掉）
5.或者跟随领袖
Mozilla引领javascript的潮流。该语言的发明 者，Brendan Eich，仍然在改进它。js语言的新特性总是在Mozilla浏览器中最先出现，如果你打算给javascript语言增加新特性，请参考 Mozilla标准先。例如，如果你想增加一个遍历数组的方法，那么请把这个方法命名为forEach而不是each。而如果你是在补全缺失的功能，则要 严格参照现有标准（参见上一条）。
6.灵活一点
如果我想在不动你的js库源代码的情况下更改某个方法的行为，是否足够简单？如果还不够简单就让它更简单一点吧。
7.管理好内存
8.去除浏览器检测
似乎浏览器厂商在增加新特性的竞争上永无休止。作为js库开发者，你应该紧跟最新的潮流，你不应该仅仅是偶尔看一下Ajaxian，你应该不知疲倦地阅读每一篇blog以便获知最新的hack，浏览器检测会让你越陷越深。
9.越小越好
许多js库已很成熟，其中一些已经被一些很重要的网站所采用。但不是每个人都在用2M的DSL宽带，所以保持你的js库小巧。最好能提供一个build页面让我能够快速的根据我的需要定制出我的js库。
10.第十条
很棒第十条，你总能信赖这一条。第十条是：可预见性。我应该可以根据方法的名字猜到它是干什么的，同样地，如果记不起一个方法的名字，我也应该可以猜得到。
11.附加的几条
1）文档，虽然讨厌但意义重大。
2）多用名字空间，这样我才不至于打电话骚扰你。
3）记住数以百万计的用户潜在用户可能会运行你的代码。
顺便声明，base2没有更改任何内建的javascript对象。
本文翻译自Rules For JavaScript Library Authors，这是Dean Edwards在开发base2时候的一些体会，对于在开发自己的js库的同学应该有较强的借鉴意义。Dean Edwards是公认的javascript高手，jQuery的作者Jhone Resig也很欣赏他。
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