npm / @fastify/deepmerge
@fastify/deepmerge
What changed in @fastify/deepmerge 3, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-19.
1 new APIs and options1 fixes and other
See which of these apply to your code, ranked, in your agent:
npx @unstale/cli init@fastify/deepmerge 32 changes
New APIs and options 1
Adds the onlyDefinedProperties option.
Fixes and other changes 1
Preserves required properties when using onlyDefinedProperties.