4、JavaScript 中的接口与封装：概念、应用与实现

JavaScript 中的接口与封装：概念、应用与实现

1. 接口类的介绍

在 JavaScript 中，接口类是一个非常实用的工具，它可以帮助我们确保对象实现了特定的方法。以下是接口类的定义：

// Constructor.
var Interface = function(name, methods) {
    if(arguments.length != 2) {
        throw new Error("Interface constructor called with " + arguments.length +
            "arguments, but expected exactly 2.");
    }
    this.name = name;
    this.methods = [];
    for(var i = 0, len = methods.length; i < len; i++) {
        if(typeof methods[i] !== 'string') {
            throw new Error("Interface constructor expects method names to be " 
                + "passed in as a string.");
        }
        this.methods.push(methods[i]);        
    }    
};    

// Static class method.
Interface.ensureImplement