Before You File a Proposal Please Confirm You Have Done The Following...

• I havesearched for related issues and found none that match my proposal.
• I have searched thecurrent rule list and found no rules that match my proposal.
• I haveread the FAQ and my problem is not listed.

My proposal is suitable for this project

• I believe my proposal would be useful to the broader TypeScript community (meaning it is not a niche proposal).

Link to the rule's documentation

https://typescript-eslint.io/rules/prefer-nullish-coalescing

Description

In cases where an assignment is made to a nullish variable via||=, it'd be nice if??= was suggested instead.

Fail

letfoo:Map<string,string>|undefined;foo||=newMap();foo=foo||newMap();// These are already handled in prefer-nullish-coalescing.(foo||newMap()).get("key");

Pass

letfoo:Map<string,string>|undefined;foo??=newMap();foo=foo??newMap();// These are already handled in prefer-nullish-coalescing.(foo??newMap()).get("key");

Additional Info

No response