JavaScript pattern for multiple constructors

37

How do you find this one?

function Foobar(foobar) {
    this.foobar = foobar;
}

Foobar.prototype = {
    foobar: null
};

Foobar.fromComponents = function(foo, bar) {
    var foobar = foo + bar;
    return new Foobar(foobar);
};

//usage: the following two lines give the same result
var x = Foobar.fromComponents('Abc', 'Cde');
var y = new Foobar('AbcDef')

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