admin管理员组

文章数量:1222774

I'm trying to implement the Revealing Module Pattern but I'm unable to expose a modified private property.

var myRevealingModule = (function(){

    var name = 'Diogo';

    function setName () {
       name = name + ' Cardoso';
    }

    return {
        fullName: name,
        set: setName
    };

}());

// Sample usage:
myRevealingModule.set();
console.log(myRevealingModule.fullName); // "Diogo" instead of the excepted "Diogo Cardoso".

I'm trying to implement the Revealing Module Pattern but I'm unable to expose a modified private property.

var myRevealingModule = (function(){

    var name = 'Diogo';

    function setName () {
       name = name + ' Cardoso';
    }

    return {
        fullName: name,
        set: setName
    };

}());

// Sample usage:
myRevealingModule.set();
console.log(myRevealingModule.fullName); // "Diogo" instead of the excepted "Diogo Cardoso".
Share Improve this question asked Mar 12, 2012 at 17:43 Diogo CardosoDiogo Cardoso 22.3k26 gold badges102 silver badges138 bronze badges
Add a comment  | 

3 Answers 3

Reset to default 24
return {
    fullName: name,
    set: setName
};

That uses the values of name and setName. It does not create a reference to the variable. Effectively, name is copied.

You need to create a corresponding getName method, to take advantage of closures so that you can keep a reference to a variable.

var myRevealingModule = (function(){

    var name = 'Diogo';

    function setName () {
       name = name + ' Cardoso';
    };

    function getName () {
       return name;
    };

    return {
        fullName: name,
        set: setName,
        get: getName
    };

}());

http://jsfiddle.net/yeXMx/

If your value is an attribute in an object or array, you can export the object or array and the export will be by reference so outside users will see updated changes. It's a little risky since the generic pattern of exporting variables has the scalar/object copy/reference dichotomy.

本文标签: javascriptExpose private variables in Revealing Module PatternStack Overflow