Nullish coalescing assignment operator (??=) in NodeJS
The error means your version of Node does not yet have support for the ??= operator.
Check out the versions which support it on node.green:
It's possible for node version v15.14+.
The rewrite for something like
a.greeting ??= "hello"
in node <v15.14 is:
a.greeting = a?.greeting ?? 'hello'
Maybe it does help someone :]
The node version you are using doesn't support the nullish coalescing assignment operator.