yarn patch

This command will cause a package to be extracted in a temporary directory intended to be editable at will.

Once you’re done with your changes, run yarn patch-commit -s path (with path being the temporary directory you received) to generate a patchfile and register it into your top-level manifest via the patch: protocol. Run yarn patch-commit -h for more details.

Calling the command when you already have a patch won’t import it by default (in other words, the default behavior is to reset existing patches). However, adding the -u,--update flag will import any current patch.

Options

Option	Description
--update	Reapply local patches that already apply to this packages
--json	Format the output as an NDJSON stream