Javascript 特性模式资源 [英] Javascript Traits Pattern Resources

问题描述

有人可以推荐在 javascript 中使用特征的好资源吗?经过一番搜索，我主要找到关于提供特征功能的库的文章，但我对如何在没有库的情况下实现特征的最佳实践感到好奇.

Could anyone recommend good resources for using traits in javascript? After some searching I mainly find articles about libraries that provide traits functionality, but I was curious about best practices on how to implement traits without a library.

我在 SO 上看到了这篇文章，还有其他方法吗?javascript 中的特征

I came across this post on SO, are there any other approaches? Traits in javascript

也欢迎任何真实世界的例子.

Any real world examples would be welcome as well.

谢谢.

推荐答案

我会建议一些简单的，大致如下:

I would suggest something simple, along the lines of:

1. 让特征定义为标准的 JavaScript 对象.

1. Let traits be defined as standard JavaScript objects.

var equalsTrait = {
    eq: function(obj) {
        return this == obj
    },
    neq: function(obj) {
        return ! this.eq(obj)
    }
};

编写一个函数，用您的特征扩展给定的类(并将其绑定到全局范围内的合理位置):

Write a function to extend a given class with your traits (and bind it to a sensible location in the global scope):

window.Traits = {};
Traits.addToClass = function(traits, cls) {
    for (var key in traits) {
        if (cls.prototype[key]) {
            alert("Class " + cls + " already has a method named " + key + "!");
        }
        else {
            cls.prototype[key] = traits[key];
        }
    }
}

利润！

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