Parsing Error when using Nullish Assignment (??=)

I'm getting the following error when attempting to bundle my project. Error: Parsing file /path/to/file.js: Unexpected token (13:22) I've traced the error to a Nullish Assignment (??=) . Changing that line to a regular assignment allows the project to build without any errors.

Is there any way to add support for this type of assignment operator or should I just avoid using it?

Thanks