v13.0.0

13.0.0 (2026-10-05)

• perf(diff)!: faster Diff and VersionInfo, Diff.patch replaces DiffNode (#158) (08308f2), closes #158
• feat(path)!: single-pass Projection, JSON-typed paths and matchers, JSON.stringify compatible jsonClone (#157) (bee1116), closes #157

Features

• core: V.memoize isStale option and cache statistics with BasicMemoizeStatsLogger #159 (6addc4f)

BREAKING CHANGES

• DiffNode and VersionInfo.diffNode are removed; use
  Diff.patch and Diff.changeset instead. DiffNodeConfig is merged into
  DiffConfig.
• Array holes are handled like undefined elements.
• Objects with a custom prototype throw "only primitives,
  arrays and plain objects are supported".
• Without a previous version, VersionInfo.matches applies
  filter, isPrimitive and includeObjects and matches only own properties, so
  e.g. undefined values (by default) and empty objects (without
  includeObjects) no longer match.
• Built-in path expressions (PropertyMatcher, IndexMatcher,
  AnyIndex, AnyProperty) are frozen, so subclasses can't add fields.
• PathMatchers, Path.get/set/unset and Path.equals/startsWith follow JSON types strictly: string
  components access only objects and numeric components only arrays. Path.set may replace the root, so its return value
  must be used. Property matchers match own and inherited enumerable properties, no longer own non-enumerable ones.
  jsonClone and Projection clone only own enumerable properties, convert NaN and Infinity to null, unwrap boxed
  primitives, and throw a TypeError for circular structures and for input without a JSON representation. Projection
  reads always paths from the JSON clone, doesn't apply toJSON, the replacer or the BigInt check to parts left out of
  the result, orders output keys like the input, and omits objects and arrays that are not included themselves when
  nothing below them is in the output.