从作为子对象方法的函数中引用主 JavaScript 对象 [英] Refer to the main JavaScript object from functions which are methods on a subobject

问题描述

在使用 javascript 对象时，我找到了这段代码:

While working with javascript object I came to this code :

var mainModule = {
    opt : {
        opt1: 'my option1',
        opt2: 'my option2',
        opt3: 'my option3',
    },
    init: function(options){
        jQuery.extend(this.opt, options);
        this.mainMethod();
    },
    mainMethod: function() {
        //do Stuff
        var color = this.opt.opt1;
    },
    secondaryMethod1: function(){/*stuff*/},
    secondaryMethod2: function(){/*stuff*/},
    secondaryMethod3: function(){/*stuff*/},
    secondaryMethod4: function(){/*stuff*/},

    thirdlyMethod1: function(){/*stuff*/},
    thirdlyMethod2: function(){/*stuff*/},
    thirdlyMethod3: function(){/*stuff*/},
    thirdlyMethod4: function(){/*stuff*/},
};

使用此代码，我经常使用 this.opt 检查 opt 对象，因为 this 是 mainModule.但是所有的代码开始变得一团糟，使用所有不同的方法所以我以这个新代码结束，在主要对象中增加了一个新的深度.

With this code I often check the opt object with this.opt as this is mainModule. But all the code begin to be a littre messy with all the different method so I ended with this new code whith a new level of depth in the main object.

var mainModule = {
    opt : {
        opt1: 'my option1',
        opt2: 'my option2',
        opt3: 'my option3',
    },
    init: function(options){
        jQuery.extend(this.opt, options);
        this.mainMethod.init();
    },
    mainMethod: {
        init: function() {
        //do Stuff
        var color = mainModule.opt.opt1;
        },
        other: function(){},
        functions: function(){},
        here: function() {}
    },
    secondary: {
        method1: function(){/*stuff*/},
        method2: function(){/*stuff*/},
        method3: function(){/*stuff*/},
        method4: function(){/*stuff*/},
    }
    thirdly: {
        Method1: function(){/*stuff*/},
        Method2: function(){/*stuff*/},
        Method3: function(){/*stuff*/},
        Method4: function(){/*stuff*/},
    }   
};

但是有了这个新的，我不能使用 this.opt 因为 this 不再是 mainModule.

But with this new one I can't use this.opt because this isn't the mainModule anymore.

对于这种对象，有没有更好的方法来检索 opt 对象?这种新的深度水平是必要的还是应该使用伪命名空间?

With this kind of object, is there a better way to retrieve the opt object ? Does this new level of depth is necessary or should I use maybe a pseudo namespace ?

推荐答案

您始终可以在 IIFE 中设置主模块，并将选项作为局部变量存储在该函数中.看起来像这样:

You could always set up the main module in an IIFE and store the options as a local variable in that function. Which looks like this:

var mainModule = (function() {
    // Keep the options out of the object that's returned.
    // Hides the options to stop things like mainModule.options.opt1 = 'EVIL';
    var opt = {};

    return { 
        init: function(options){
            jQuery.extend(opt, options);
            this.mainMethod.init();
        },
        mainMethod: {
            init: function() {
                console.log(opt);
            },
            other: function(){},
            functions: function(){},
            here: function() {}
        },
        secondary: {
            method1: function(){},
            method2: function(){},
            method3: function(){},
            method4: function(){},
        },
        thirdly: {
            Method1: function(){},
            Method2: function(){},
            Method3: function(){},
            Method4: function(){},
        }
    };
}());

现在你所有的函数都可以只引用opt——你甚至不再需要this.

Now all your functions can just reference opt - you don't even need this anymore.

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