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Asked: 2026-06-14T19:10:23+00:00

Suppose I have a Foo object How can I extend this object by adding

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Suppose I have a Foo object

How can I extend this object by adding a bar() method and also ensure that future instances of Foo have this method?

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1 Answer

  1. Editorial Team

    you need to add it to Foo’s prototype:

    function Foo(){}
Foo.prototype.bar = function(){}
var x = new Foo()
x.bar()
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