Bug: cannot remove/clear document title

[JakeSidSmith]

Do you want to request a feature or report a bug?

Bug

What is the current behavior?

Attempting to remove a title with any of the following does not remove the title: <title>{''}</title>, <title>{undefined}</title>, <title />

Minimal reproduction: https://codepen.io/jakesidsmith/pen/abPLPxm

What is the expected behavior?

The document title should be removed (set to empty string).

Which versions of React and react-helmet, and which browser / OS are affected by this issue?
Did this work in previous versions of React and/or react-helmet?

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I have not tested any other versions.

Additional notes:

This is a particularly frustrating limitation as I intend to use react-helmet within one of my libraries, so I won't have control over users' code, but I want users of my library to be able to see where they have forgotten to add a title and currently (because react-helmet maintains the previous title) it is hard to know where titles have been missed. To make things worse, only after reloading the page, or a user navigating to a page for the first time will the missing title be highlighted.

[JakeSidSmith]

I opened an issue rather than a pull request, as I'm not sure if this is intended behavior.

If this is intended, then it would be nice to have an option to disable it. I'd be happy to add this feature myself.

[moon-xt]

same issue