# Changelog

_**If you are upgrading:** please see [`UPGRADING.md`](UPGRADING.md)._

## [5.0.1] - 2020-06-26

### Added

- Run `abstract-leveldown` tests on `levelup` interface ([#90](https://github.com/level/subleveldown/issues/90)) ([`8928189`](https://github.com/level/subleveldown/commit/8928189)) ([**@vweevers**](https://github.com/vweevers))

### Fixed

- Don't mutate arguments object, which fails in strict mode ([#93](https://github.com/level/subleveldown/issues/93)) ([`5513c83`](https://github.com/level/subleveldown/commit/5513c83)) ([**@andymatuschak**](https://github.com/andymatuschak))

## [5.0.0] - 2020-04-05

### Changed

- **Breaking:** parent db must support deferredOpen ([#89](https://github.com/level/subleveldown/issues/89)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `dependency-check` devDependency from `^3.3.0` to `^4.1.0` ([`b47f991`](https://github.com/level/subleveldown/commit/b47f991)) ([**@vweevers**](https://github.com/vweevers))

### Fixed

- **Breaking:** fix iterating buffer keys that contain bytes 196-255 ([#88](https://github.com/level/subleveldown/issues/88)) ([**@vweevers**](https://github.com/vweevers))

## [4.1.4] - 2019-10-08

### Fixed

- Fix double prefixes ([#81](https://github.com/level/subleveldown/issues/81)) ([**@vweevers**](https://github.com/vweevers))
- Fix `open()` test ([#80](https://github.com/level/subleveldown/issues/80)) ([**@vweevers**](https://github.com/vweevers))

## [4.1.3] - 2019-09-17

### Changed

- Use `reachdown` package ([Level/community#82](https://github.com/Level/community/issues/82)) ([#75](https://github.com/level/subleveldown/issues/75)) ([**@vweevers**](https://github.com/vweevers))

## [4.1.2] - 2019-09-12

### Changed

- Upgrade `standard` devDependency from `^13.0.1` to `^14.0.0` ([#71](https://github.com/level/subleveldown/issues/71)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `hallmark` devDependency from `^1.0.0` to `^2.0.0` ([#72](https://github.com/level/subleveldown/issues/72)) ([**@vweevers**](https://github.com/vweevers))

### Removed

- Remove outdated `example.js` ([`3ef72c9`](https://github.com/level/subleveldown/commit/3ef72c9)) ([**@vweevers**](https://github.com/vweevers))

### Fixed

- Polish `clear()` ([#74](https://github.com/level/subleveldown/issues/74)) ([**@vweevers**](https://github.com/vweevers))
  - Bump `levelup`, `abstract-leveldown` and `encoding-down` to prevent dedupe
  - Opt-in to new `clear()` tests
  - Prefer optimized implementation of `clear()`

## [4.1.1] - 2019-08-18

### Changed

- Upgrade `memdown` devDependency from `^4.0.0` to `^5.0.0` ([#70](https://github.com/level/subleveldown/issues/70)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `hallmark` devDependency from `^0.1.0` to `^1.0.0` ([#68](https://github.com/level/subleveldown/issues/68)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `standard` devDependency from `^12.0.1` to `^13.0.1` ([#67](https://github.com/level/subleveldown/issues/67)) ([**@vweevers**](https://github.com/vweevers))

### Fixed

- Relax `isAbstract()` check ([`fbbf525`](https://github.com/level/subleveldown/commit/fbbf525)) ([**@vweevers**](https://github.com/vweevers))

## [4.1.0] - 2019-06-28

### Changed

- Upgrade `nyc` devDependency from `^13.3.0` to `^14.0.0` ([#63](https://github.com/level/subleveldown/issues/63)) ([**@vweevers**](https://github.com/vweevers))

### Added

- Support seeking ([#66](https://github.com/level/subleveldown/issues/66)) ([**@MeirionHughes**](https://github.com/MeirionHughes))

## [4.0.0] - 2019-04-06

### Changed

- Upgrade `abstract-leveldown` from `^5.0.0` to `^6.0.2` ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `encoding-down` from `^5.0.3` to `^6.0.1` ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `levelup` from `^3.0.1` to `^4.0.1` ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Avoid unnecessary copy of batch operations ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Invoke abstract tests from single function ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Add mandatory `db` argument to abstract iterator ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `memdown` devDependency from `^3.0.0` to `^4.0.0` ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `nyc` devDependency from `^12.0.2` to `^13.3.0` ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Upgrade `standard` devDependency from `^11.0.1` to `^12.0.1` ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Apply common project tweaks ([#58](https://github.com/level/subleveldown/issues/58), [#59](https://github.com/level/subleveldown/issues/59)) ([**@vweevers**](https://github.com/vweevers))

### Added

- Test that errors from `open()` and iterators bubble up ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Test without a user-provided `levelup` layer ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Gitignore `coverage` directory ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))

### Removed

- Remove obsolete `_batch()` checks ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))
- Remove dummy location from `abstract-leveldown` constructor call ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))

### Fixed

- Serialize non-buffer keys to strings ([#61](https://github.com/level/subleveldown/issues/61)) ([**@vweevers**](https://github.com/vweevers))

## [3.0.1] - 2018-07-27

### Added

- Add `nyc` and `coveralls` ([**@ralphtheninja**](https://github.com/ralphtheninja))

### Removed

- Remove node 9 ([**@ralphtheninja**](https://github.com/ralphtheninja))

### Fixed

- Pass on `fillCache` option to `SubIterator` ([**@Nocory**](https://github.com/Nocory))

## [3.0.0] - 2018-06-07

### Added

- Test that iterator options are forwarded ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Test concatenating Buffer keys ([**@ralphtheninja**](https://github.com/ralphtheninja))

### Changed

- Call `cleanup()` cb synchronously ([**@ralphtheninja**](https://github.com/ralphtheninja))

### Removed

- Remove `makeExistingDbTest()` from `test/common.js` ([**@ralphtheninja**](https://github.com/ralphtheninja))

## [3.0.0-rc1] - 2018-06-03

### Changed

- Upgrade `levelup` from `^1.2.1` to `^3.0.1` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Upgrade `abstract-leveldown` from `^2.4.1` to `^5.0.0` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Upgrade `memdown` devDependency from `^1.1.0` to `^3.0.0` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Upgrade `tape` devDependency from `^4.2.2` to `^4.9.0` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Upgrade `standard` devDependency from `^5.3.1` to `^11.0.1` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Update links in `package.json` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Replace `util.inherits` with `inherits` module ([**@ralphtheninja**](https://github.com/ralphtheninja))
- `SubIterator` should inherit from `AbstractIterator` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Use underscore methods to properly override ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Change `SubDown#type` from `subdown` to `subleveldown` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Rewrite `SubDown#_open` to handle any inner \*downs ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Update sublevel specific tests to handle `levelup` + `encoding-down` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Update README ([**@ralphtheninja**](https://github.com/ralphtheninja), [**@vweevers**](https://github.com/vweevers))

### Added

- Depend on `encoding-down` for encoding logic ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Add node 6, 8, 9 and 10 to Travis ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Test `SubDown` constructor ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Test main subdb ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Test encodings ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Test wrapping a closed `levelup` and re-opening it ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Test nested sublevels ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Add temporary `down()` and `isAbstract()` functions ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Add `UPGRADING.md` ([**@ralphtheninja**](https://github.com/ralphtheninja))

### Removed

- Remove node 0.12 from Travis ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Remove `SubDown#destroy` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Remove `SubDown#repair` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Remove `SubDown#setDb` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Remove `SubDown#approximateSize` ([**@ralphtheninja**](https://github.com/ralphtheninja))
- Remove `SubDown#getProperty` ([**@ralphtheninja**](https://github.com/ralphtheninja))

### Fixed

- Fix deprecated `new Buffer()` ([**@ralphtheninja**](https://github.com/ralphtheninja))

## [2.1.0] - 2015-10-30

### Changed

- Use `standard` for linting ([**@mafintosh**](https://github.com/mafintosh))
- Upgrade `abstract-leveldown` from `^2.1.0` to `^2.4.1` ([**@mafintosh**](https://github.com/mafintosh))
- Upgrade `levelup` from `^0.19.0` to `^1.2.1` ([**@mafintosh**](https://github.com/mafintosh))
- Upgrade `memdown` devDependency from `^1.0.0` to `^1.1.1` ([**@mafintosh**](https://github.com/mafintosh))
- Upgrade `tape` devDependency from `^3.0.3` to `^4.2.2` ([**@mafintosh**](https://github.com/mafintosh))
- Add `opts` parameter to `SubDown` for custom open logic ([**@mafintosh**](https://github.com/mafintosh))
- Add `opts.open` open hook ([**@mafintosh**](https://github.com/mafintosh))

## [2.0.0] - 2015-02-04

### Changed

- Do not strip separator when nested for more transparent usage ([**@mafintosh**](https://github.com/mafintosh))

## [1.1.0] - 2015-01-28

### Changed

- Rename `subdown.js` to `leveldown.js` ([**@mafintosh**](https://github.com/mafintosh))

## [1.0.6] - 2015-01-06

### Fixed

- Fix binary end ([**@mafintosh**](https://github.com/mafintosh))

## [1.0.5] - 2015-01-06

### Fixed

- Fix iterator issue ([**@mafintosh**](https://github.com/mafintosh))

## [1.0.4] - 2014-12-31

### Changed

- Do not require prefix and forward separator ([**@mafintosh**](https://github.com/mafintosh))

## [1.0.3] - 2014-12-31

### Fixed

- Add missing `tape` dependency ([**@mafintosh**](https://github.com/mafintosh))

## [1.0.2] - 2014-12-31

### Changed

- Document api in README ([**@mafintosh**](https://github.com/mafintosh))
- Use `levelup` and `memdown` in `example.js` ([**@mafintosh**](https://github.com/mafintosh))
- Respect binary encoding in key prefixes ([**@mafintosh**](https://github.com/mafintosh))

### Added

- Add node 0.10 to Travis ([**@mafintosh**](https://github.com/mafintosh))
- Add `abstract-leveldown` test suite ([**@mafintosh**](https://github.com/mafintosh))

## [1.0.1] - 2014-12-29

### Fixed

- Forward all iterator options ([**@mafintosh**](https://github.com/mafintosh))

## 1.0.0 - 2014-12-23

:seedling: Initial release.

[5.0.1]: https://github.com/level/subleveldown/compare/v5.0.0...v5.0.1

[5.0.0]: https://github.com/level/subleveldown/compare/v4.1.4...v5.0.0

[4.1.4]: https://github.com/level/subleveldown/compare/v4.1.3...v4.1.4

[4.1.3]: https://github.com/level/subleveldown/compare/v4.1.2...v4.1.3

[4.1.2]: https://github.com/level/subleveldown/compare/v4.1.1...v4.1.2

[4.1.1]: https://github.com/level/subleveldown/compare/v4.1.0...v4.1.1

[4.1.0]: https://github.com/level/subleveldown/compare/v4.0.0...v4.1.0

[4.0.0]: https://github.com/level/subleveldown/compare/v3.0.1...v4.0.0

[3.0.1]: https://github.com/level/subleveldown/compare/v3.0.0...v3.0.1

[3.0.0]: https://github.com/level/subleveldown/compare/v3.0.0-rc1...v3.0.0

[3.0.0-rc1]: https://github.com/level/subleveldown/compare/v2.1.0...v3.0.0-rc1

[2.1.0]: https://github.com/level/subleveldown/compare/v2.0.0...v2.1.0

[2.0.0]: https://github.com/level/subleveldown/compare/v1.1.0...v2.0.0

[1.1.0]: https://github.com/level/subleveldown/compare/v1.0.6...v1.1.0

[1.0.6]: https://github.com/level/subleveldown/compare/v1.0.5...v1.0.6

[1.0.5]: https://github.com/level/subleveldown/compare/v1.0.4...v1.0.5

[1.0.4]: https://github.com/level/subleveldown/compare/v1.0.3...v1.0.4

[1.0.3]: https://github.com/level/subleveldown/compare/v1.0.2...v1.0.3

[1.0.2]: https://github.com/level/subleveldown/compare/v1.0.1...v1.0.2

[1.0.1]: https://github.com/level/subleveldown/compare/v1.0.0...v1.0.1