Maybe.js

function Maybe ( val ) {
    this.__val        = val;
    this.__error      = this.isError();
    this.__defaultVal = null;
}

Maybe.prototype.isError = function () {
    var val = this.__val;   
    return (null === val) 
           || (undefined === val)
           || (Infinity === val)
};

Maybe.prototype.mBind = function ( f ) {
    var val = this.__val;

    if ( this.isError() ) {
        this.__val   = null;
        this.__error = true;
        return this;
    }
    
    try {
        this.__val = f( val );
    }
    catch ( e ) {
        this.__val  = null;
        this.__error = true;
        console.log( 'Maybe error :: ', e );
    }
    finally {
        return this;
    }
};

Maybe.prototype.mDefault = function ( val ) {
    this.__defaultVal = val;
    return this;
};

Maybe.prototype.value = function () {
    return this.__error ? this.__defaultVal : this.__val;
};

Example: http://jsfiddle.net/azaviruha/pusn0zLL/15/