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CHANGELOG.md

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cringe lorg

10.2.0

  • types: implement the Map<K, V> interface

10.1.0

  • add cache.info(key) to get value as well as ttl and size information.

10.0.0

  • cache.fetch() return type is now Promise<V | undefined> instead of Promise<V | void>. This is an irrelevant change practically speaking, but can require changes for TypeScript users.

9.1.0

  • cache.set(key, undefined) is now an alias for cache.delete(key)

9.0.0

  • Use named export only, no default export.
  • Bring back minimal polyfill. If this polyfill ends up being used, then a warning is printed, as it is not safe for use outside of LRUCache.

8.0.0

  • The fetchContext option was renamed to context, and may no longer be set on the cache instance itself.
  • Rewritten in TypeScript, so pretty much all the types moved around a lot.
  • The AbortController/AbortSignal polyfill is removed. For this reason, Node version 16.14.0 or higher is now required.
  • Internal properties were moved to actual private class properties.
  • Keys and values must not be null or undefined.
  • Minified export available at 'lru-cache/min', for both CJS and MJS builds.

7.18.0

  • Add support for internal state investigation through the use of a status option to has(), set(), get(), and fetch().

7.17.0

  • Add signal option for fetch to pass a user-supplied AbortSignal
  • Add ignoreFetchAbort and allowStaleOnFetchAbort options

7.16.2

  • Fail fetch() promises when they are aborted

7.16.0

  • Add allowStaleOnFetchRejection option

7.15.0

  • Provide both ESM and CommonJS exports

7.14.0

  • Add maxEntrySize option to prevent caching items above a given calculated size.

7.13.0

  • Add forceRefresh option to trigger a call to the fetchMethod even if the item is found in cache, and not older than its ttl.

7.12.0

  • Add fetchContext option to provide additional information to the fetchMethod
  • 7.12.1: Fix bug where adding an item with size greater than maxSize would cause bizarre behavior.

7.11.0

  • Add 'noDeleteOnStaleGet' option, to suppress behavior where a get() of a stale item would remove it from the cache.

7.10.0

  • Add noDeleteOnFetchRejection option, to suppress behavior where a failed fetch will delete a previous stale value.
  • Ship types along with the package, rather than relying on out of date types coming from DefinitelyTyped.

7.9.0

  • Better AbortController polyfill, supporting signal.addEventListener('abort') and signal.onabort.
  • (7.9.1) Drop item from cache instead of crashing with an unhandledRejection when the fetchMethod throws an error or returns a rejected Promise.

7.8.0

  • add updateAgeOnHas option
  • warnings sent to console.error if process.emitWarning unavailable

7.7.0

  • fetch: provide options and abort signal

7.6.0

  • add cache.getRemainingTTL(key)
  • Add async cache.fetch() method, fetchMethod option
  • Allow unbounded storage if maxSize or ttl set

7.5.0

  • defend against mutation while iterating
  • Add rentries, rkeys, rvalues
  • remove bundler and unnecessary package.json fields

7.4.0

  • Add browser optimized webpack bundle, exposed as 'lru-cache/browser'
  • Track size of compiled bundle in CI (@SuperOleg39)
  • Add noUpdateTTL option for set()

7.3.0

  • Add disposeAfter()
  • set() returns the cache object
  • delete() returns boolean indicating whether anything was deleted

7.2.0

  • Add reason to dispose() calls.

7.1.0

  • Add ttlResolution option
  • Add ttlAutopurge option

v7 - 2022-02

This library changed to a different algorithm and internal data structure in version 7, yielding significantly better performance, albeit with some subtle changes as a result.

If you were relying on the internals of LRUCache in version 6 or before, it probably will not work in version 7 and above.

Specific API Changes

For the most part, the feature set has been maintained as much as possible.

However, some other cleanup and refactoring changes were made in v7 as well.

  • The set(), get(), and has() functions take options objects instead of positional booleans/integers for optional parameters.
  • size can be set explicitly on set().
  • cache.length was renamed to the more fitting cache.size.
  • Deprecations:
    • stale option -> allowStale
    • maxAge option -> ttl
    • length option -> sizeCalculation
    • length property -> size
    • del() method -> delete()
    • prune() method -> purgeStale()
    • reset() method -> clear()
  • The objects used by cache.load() and cache.dump() are incompatible with previous versions.
  • max and maxSize are now two separate options. (Previously, they were a single max option, which would be based on either count or computed size.)
  • The function assigned to the dispose option is now expected to have signature (value, key, reason) rather than (key, value), reversing the order of value and key.

v6 - 2020-07

  • Drop support for node v8 and earlier

v5 - 2018-11

  • Add updateAgeOnGet option
  • Guards around setting max/maxAge to non-numbers
  • Use classes, drop support for old nodes

v4 - 2015-12

  • Improve performance
  • add noDisposeOnSet option
  • feat(prune): allow users to proactively prune old entries
  • Use Symbols for private members
  • Add maxAge setter/getter

v3 - 2015-11

  • Add cache.rforEach
  • Allow non-string keys

v2 - 2012-08

  • add cache.pop()
  • add cache.peek()
  • add cache.keys()
  • add cache.values()
  • fix memory leak
  • add stale option to return stale values before deleting
  • use null-prototype object to avoid hazards
  • make options argument an object

v1 - 2010-05

  • initial implementation