允許插入參數

Question

我有下面的代碼，允許我用插件擴展基本的Lib類。該插件有它自己的上下文和庫上下文是以流

Lib = function (test,width) { 
    this.libraryProp = test; 
    this.width = width; 
} 

Lib.extend = function(name,plugin) { 
    this.prototype[name] = function() { 
    return new plugin(this); 
} 
} 

//The plugin 
var myObj = function(lib) { 
    this.chart = chart; 
    this.pluginProp = 'plug'; 
    console.log('this library prop = ' + this.chart.libraryProp); 
} 

//A plugin method 
myObj.prototype.ggg = function() { 
    console.log('plugin prop in plugin prototype ' + this.pluginProp); 
    console.log(this.chart); 
    console.log('______________________________________________'); 
} 

//extend the base library 
Lib.extend('myObj',myObj) 


var p = new Lib('instance 1', 900); 
var u = p.myObj(); 
u.ggg(); 


var m = new Lib('instance 2',800); 
var k = m.myObj(); 
k.ggg(); 

工作小提琴：http://jsfiddle.net/pnwLv/2/

它所有的作品，但我目前無法養活任何插件，像參數，以便：

var u = p.myObj('param1','param2'); 

我該如何重新考慮擴展方法來允許這個？

Answer 1

像這樣的東西？

Lib.extend = function (name, plugin) { 
    this.prototype[name] = function() { 
    var args = Array.prototype.slice.call(arguments), 
     obj = Object.create(plugin.prototype); // Create a new object from the plugin prototype 

    args.unshift(this); // Add Lib instance as the first argument 
    plugin.apply(obj, args); // Call the plugin constructor with the new object as the context 
    return obj; // Return the newly created object 
    } 
} 

然後你可以檢索插件構造這些參數：

var myObj = function(lib, param1, param2) { 
    this.lib = lib; 
    this.pluginProp = 'plug'; 
    console.log('this library prop = ' + this.lib.libraryProp); 
}