Modifying JavaScript prototypes on the fly can lead to troublesome issues

My curiosity has been piqued by the concept of dynamically changing a constructor's prototype in JavaScript, leading me to the findings above.

It appears that an already constructed instance does not inherit the properties of the newly changed prototype.

I'm left wondering if this design choice was intentional or just happens naturally. I had anticipated the instance to share the new prototype's properties. Thank you!

Answer №1

When a new item is formed, its prototype link is established during that moment based on the constructor function's prototype property value. Any modifications to the constructor property afterward do not impact the existing objects.

That's simply the way it functions.

Therefore, yes, this could potentially lead to issues. It might be possible to manipulate this for a specific purpose, but it would certainly be quite unusual.

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