toss/es-toolkit v1.50.0

on GitHub

Released on July 24th, 2026.

• Added the es-toolkit/types entrypoint: a declaration-only module of compile-time type utilities TypeScript lacks natively — ValueOf, Simplify, Writable, NonEmptyArray, DeepPartial, and DeepReadonly. ([#1818])
• Added flow to es-toolkit/fp, a reusable data-last composition built on pipe. ([#1812])

The following bring es-toolkit/compat closer to Lodash. Behavior for the affected edge cases now matches Lodash, so results may differ if you relied on the previous output.

• Fixed compat/intersectionBy to dedupe a single array (including by the iteratee) and to keep results consistent with Lodash. ([#1935])

• Fixed compat/findIndex and compat/findLastIndex to coerce a NaN fromIndex to 0 and to convert fromIndex to an integer. ([#1828], [#1834], [#1938])

• Fixed compat/lastIndexOf to coerce fromIndex like Lodash. ([#1832])

• Fixed compat/every to treat a falsy, non-nullish doesMatch as a _.property shorthand instead of identity. ([#1940])

• Fixed compat/nth to support string inputs. ([#1833])

• Fixed compat/inRange to not throw on a lone negative bound. ([#1835])

• Fixed compat/toArray to convert Sets to arrays like Lodash. ([#1840])

• Fixed compat/values to treat sparse array holes as undefined. ([#1894])

• Fixed compat/maxBy and compat/minBy to restore Lodash-compatible comparison. ([#1893])

• Fixed compat/includes to exclude the length property when matching array-like values. ([#1886])

• Fixed the case functions to split ordinal numbers like Lodash, and to count string size and padding by code points for multi-byte characters. ([#1836], [#1852], [#1853])

• Fixed compat/unset to not treat an own literal dotted key as a deep path. ([#1808])

• Moved compat/flattenDepth's flattening logic out of flatten. ([#1847])

• Restored the standalone eq and templateSettings entry points. ([#1895])

• Fixed deburr to remove all combining diacritical marks, matching Lodash. ([#1807])

• Fixed partition to accept any predicate return value, like Array.prototype.filter. ([#1937])

• Fixed has and hasIn to prioritize nullish literal keys over paths. ([#1810])

• Fixed invokeMap to normalize a string path via toPath for this binding. ([#1814])

• Fixed isDeepKey to detect deep keys with stricter patterns. ([#1621])

• Fixed unzipWith to return an empty array instead of throwing on empty input. ([#1816])

• Improved documentation, JSDoc accuracy, and internal refactoring across compat and fp. ([#1817], [#1820], [#1822], [#1823], [#1825], [#1829], [#1830], [#1842], [#1845], [#1851], [#1858], [#1867], [#1879])

We sincerely thank @Antoliny0919, @raon0211, @dayongkr, @spokodev, @sarathfrancis90, @mayur-shenoy, @mahirhir, @kojesung, @Hprogram, @BangDori, and everyone else who contributed. We appreciate your great efforts!