If you add a comma after the property of the object, it creates a new object.

🐛 bug report

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• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project
  adheres to.
• I have searched the issue tracker for an issue that matches the one I want
  to file, without success.

Description of the problem

If you add a comma after the property of the object, it creates a new object.

How has this issue affected you? What are you trying to accomplish?

Object B refers to object A. However, due to commas, object A and object B have become completely different objects.

To Reproduce

Link to sandbox: link (optional)

const initialPosition = {
  x: 0,
  y: 0
};

Replace the code above with the code below.

const initialPosition = {
  x: 0,
  y: 0,,,,
};

And if I change it to the code below

const initialPosition = {
  x: 0,
  y: 0
};

The object seems to be newly created.

Your Environment

Reproduce the example in the linked CodeSandbox, using App.js and the two object literals shown. Compare the behavior with and without the extra commas, then trace the relevant JavaScript or CodeSandbox path if the issue is confirmed. Done means the reported object behavior is corrected or its non-repository cause is established.