6.7.0

- [New] `stringify`/`parse`: add `comma` as an `arrayFormat` option (#276, #219)
- [Fix] correctly parse nested arrays (#212)
- [Fix] `utils.merge`: avoid a crash with a null target and a truthy non-array source, also with an array source
- [Robustness] `stringify`: cache `Object.prototype.hasOwnProperty`
- [Refactor] `utils`: `isBuffer`: small tweak; add tests
- [Refactor] use cached `Array.isArray`
- [Refactor] `parse`/`stringify`: make a function to normalize the options
- [Refactor] `utils`: reduce observable [[Get]]s
- [Refactor] `stringify`/`utils`: cache `Array.isArray`
- [Tests] always use `String(x)` over `x.toString()`
- [Tests] fix Buffer tests to work in node < 4.5 and node < 5.10
- [Tests] temporarily allow coverage to fail

# <strong>6.6.0</strong>

- [New] Add support for iso-8859-1, utf8 "sentinel" and numeric entities (#268)
- [New] move two-value combine to a `utils` function (#189)
- [Fix] `stringify`: fix a crash with `strictNullHandling` and a custom `filter`/`serializeDate` (#279)
- [Fix] when `parseArrays` is false, properly handle keys ending in `[]` (#260)
- [Fix] `stringify`: do not crash in an obscure combo of `interpretNumericEntities`, a bad custom `decoder`, & `iso-8859-1`
- [Fix] `utils`: `merge`: fix crash when `source` is a truthy primitive & no options are provided
- [refactor] `stringify`: Avoid arr = arr.concat(...), push to the existing instance (#269)
- [Refactor] `parse`: only need to reassign the var once
- [Refactor] `parse`/`stringify`: clean up `charset` options checking; fix defaults
- [Refactor] add missing defaults
- [Refactor] `parse`: one less `concat` call
- [Refactor] `utils`: `compactQueue`: make it explicitly side-effecting
- [Dev Deps] update `browserify`, `eslint`, `@ljharb/eslint-config`, `iconv-lite`, `safe-publish-latest`, `tape`
- [Tests] up to `node` `v10.10`, `v9.11`, `v8.12`, `v6.14`, `v4.9`; pin included builds to LTS

# <strong>6.5.2</strong>

- [Fix] use `safer-buffer` instead of `Buffer` constructor
- [Refactor] utils: `module.exports` one thing, instead of mutating `exports` (#230)
- [Dev Deps] update `browserify`, `eslint`, `iconv-lite`, `safer-buffer`, `tape`, `browserify`

# <strong>6.5.1</strong>

- [Fix] Fix parsing & compacting very deep objects (#224)
- [Refactor] name utils functions
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `tape`
- [Tests] up to `node` `v8.4`; use `nvm install-latest-npm` so newer npm doesn’t break older node
- [Tests] Use precise dist for Node.js 0.6 runtime (#225)
- [Tests] make 0.6 required, now that it’s passing
- [Tests] on `node` `v8.2`; fix npm on node 0.6

# <strong>6.5.0</strong>

- [New] add `utils.assign`
- [New] pass default encoder/decoder to custom encoder/decoder functions (#206)
- [New] `parse`/`stringify`: add `ignoreQueryPrefix`/`addQueryPrefix` options, respectively (#213)
- [Fix] Handle stringifying empty objects with addQueryPrefix (#217)
- [Fix] do not mutate `options` argument (#207)
- [Refactor] `parse`: cache index to reuse in else statement (#182)
- [Docs] add various badges to readme (#208)
- [Dev Deps] update `eslint`, `browserify`, `iconv-lite`, `tape`
- [Tests] up to `node` `v8.1`, `v7.10`, `v6.11`; npm v4.6 breaks on node < v1; npm v5+ breaks on node < v4
- [Tests] add `editorconfig-tools`

# <strong>6.4.0</strong>

- [New] `qs.stringify`: add `encodeValuesOnly` option
- [Fix] follow `allowPrototypes` option during merge (#201, #201)
- [Fix] support keys starting with brackets (#202, #200)
- [Fix] chmod a-x
- [Dev Deps] update `eslint`
- [Tests] up to `node` `v7.7`, `v6.10`,`v4.8`; disable osx builds since they block linux builds
- [eslint] reduce warnings

# <strong>6.3.2</strong>

- [Fix] follow `allowPrototypes` option during merge (#201, #200)
- [Dev Deps] update `eslint`
- [Fix] chmod a-x
- [Fix] support keys starting with brackets (#202, #200)
- [Tests] up to `node` `v7.7`, `v6.10`,`v4.8`; disable osx builds since they block linux builds

# <strong>6.3.1</strong>

- [Fix] ensure that `allowPrototypes: false` does not ever shadow Object.prototype properties (thanks, @snyk!)
- [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `browserify`, `iconv-lite`, `qs-iconv`, `tape`
- [Tests] on all node minors; improve test matrix
- [Docs] document stringify option `allowDots` (#195)
- [Docs] add empty object and array values example (#195)
- [Docs] Fix minor inconsistency/typo (#192)
- [Docs] document stringify option `sort` (#191)
- [Refactor] `stringify`: throw faster with an invalid encoder
- [Refactor] remove unnecessary escapes (#184)
- Remove contributing.md, since `qs` is no longer part of `hapi` (#183)

# <strong>6.3.0</strong>

- [New] Add support for RFC 1738 (#174, #173)
- [New] `stringify`: Add `serializeDate` option to customize Date serialization (#159)
- [Fix] ensure `utils.merge` handles merging two arrays
- [Refactor] only constructors should be capitalized
- [Refactor] capitalized var names are for constructors only
- [Refactor] avoid using a sparse array
- [Robustness] `formats`: cache `String#replace`
- [Dev Deps] update `browserify`, `eslint`, `@ljharb/eslint-config`; add `safe-publish-latest`
- [Tests] up to `node` `v6.8`, `v4.6`; improve test matrix
- [Tests] flesh out arrayLimit/arrayFormat tests (#107)
- [Tests] skip Object.create tests when null objects are not available
- [Tests] Turn on eslint for test files (#175)

# <strong>6.2.3</strong>

- [Fix] follow `allowPrototypes` option during merge (#201, #200)
- [Fix] chmod a-x
- [Fix] support keys starting with brackets (#202, #200)
- [Tests] up to `node` `v7.7`, `v6.10`,`v4.8`; disable osx builds since they block linux builds

# <strong>6.2.2</strong>

- [Fix] ensure that `allowPrototypes: false` does not ever shadow Object.prototype properties

# <strong>6.2.1</strong>

- [Fix] ensure `key[]=x&key[]&key[]=y` results in 3, not 2, values
- [Refactor] Be explicit and use `Object.prototype.hasOwnProperty.call`
- [Tests] remove `parallelshell` since it does not reliably report failures
- [Tests] up to `node` `v6.3`, `v5.12`
- [Dev Deps] update `tape`, `eslint`, `@ljharb/eslint-config`, `qs-iconv`

# <a href="https://github.com/ljharb/qs/issues?milestone=36&state=closed"><strong>6.2.0</strong></a>

- [New] pass Buffers to the encoder/decoder directly (#161)
- [New] add "encoder" and "decoder" options, for custom param encoding/decoding (#160)
- [Fix] fix compacting of nested sparse arrays (#150)

# **6.1.2

- [Fix] follow `allowPrototypes` option during merge (#201, #200)
- [Fix] chmod a-x
- [Fix] support keys starting with brackets (#202, #200)
- [Tests] up to `node` `v7.7`, `v6.10`,`v4.8`; disable osx builds since they block linux builds

# <strong>6.1.1</strong>

- [Fix] ensure that `allowPrototypes: false` does not ever shadow Object.prototype properties

# <a href="https://github.com/ljharb/qs/issues?milestone=35&state=closed"><strong>6.1.0</strong></a>

- [New] allowDots option for `stringify` (#151)
- [Fix] "sort" option should work at a depth of 3 or more (#151)
- [Fix] Restore `dist` directory; will be removed in v7 (#148)

# <strong>6.0.4</strong>

- [Fix] follow `allowPrototypes` option during merge (#201, #200)
- [Fix] chmod a-x
- [Fix] support keys starting with brackets (#202, #200)
- [Tests] up to `node` `v7.7`, `v6.10`,`v4.8`; disable osx builds since they block linux builds

# <strong>6.0.3</strong>

- [Fix] ensure that `allowPrototypes: false` does not ever shadow Object.prototype properties
- [Fix] Restore `dist` directory; will be removed in v7 (#148)

# <a href="https://github.com/ljharb/qs/issues?milestone=33&state=closed"><strong>6.0.2</strong></a>

- Revert ES6 requirement and restore support for node down to v0.8.

# <a href="https://github.com/ljharb/qs/issues?milestone=32&state=closed"><strong>6.0.1</strong></a>

- **#127** Fix engines definition in package.json

# <a href="https://github.com/ljharb/qs/issues?milestone=31&state=closed"><strong>6.0.0</strong></a>

- **#124** Use ES6 and drop support for node < v4

# <strong>5.2.1</strong>

- [Fix] ensure `key[]=x&key[]&key[]=y` results in 3, not 2, values

# <a href="https://github.com/ljharb/qs/issues?milestone=30&state=closed"><strong>5.2.0</strong></a>

- **#64** Add option to sort object keys in the query string

# <a href="https://github.com/ljharb/qs/issues?milestone=29&state=closed"><strong>5.1.0</strong></a>

- **#117** make URI encoding stringified results optional
- **#106** Add flag `skipNulls` to optionally skip null values in stringify

# <a href="https://github.com/ljharb/qs/issues?milestone=28&state=closed"><strong>5.0.0</strong></a>

- **#114** default allowDots to false
- **#100** include dist to npm

# <a href="https://github.com/ljharb/qs/issues?milestone=26&state=closed"><strong>4.0.0</strong></a>

- **#98** make returning plain objects and allowing prototype overwriting properties optional

# <a href="https://github.com/ljharb/qs/issues?milestone=24&state=closed"><strong>3.1.0</strong></a>

- **#89** Add option to disable "Transform dot notation to bracket notation"

# <a href="https://github.com/ljharb/qs/issues?milestone=23&state=closed"><strong>3.0.0</strong></a>

- **#80** qs.parse silently drops properties
- **#77** Perf boost
- **#60** Add explicit option to disable array parsing
- **#74** Bad parse when turning array into object
- **#81** Add a `filter` option
- **#68** Fixed issue with recursion and passing strings into objects.
- **#66** Add mixed array and object dot notation support Closes: #47
- **#76** RFC 3986
- **#85** No equal sign
- **#84** update license attribute

# <a href="https://github.com/ljharb/qs/issues?milestone=20&state=closed"><strong>2.4.1</strong></a>

- **#73** Property 'hasOwnProperty' of object #<Object> is not a function

# <a href="https://github.com/ljharb/qs/issues?milestone=19&state=closed"><strong>2.4.0</strong></a>

- **#70** Add arrayFormat option

# <a href="https://github.com/ljharb/qs/issues?milestone=18&state=closed"><strong>2.3.3</strong></a>

- **#59** make sure array indexes are >= 0, closes #57
- **#58** make qs usable for browser loader

# <a href="https://github.com/ljharb/qs/issues?milestone=17&state=closed"><strong>2.3.2</strong></a>

- **#55** allow merging a string into an object

# <a href="https://github.com/ljharb/qs/issues?milestone=16&state=closed"><strong>2.3.1</strong></a>

- **#52** Return "undefined" and "false" instead of throwing "TypeError".

# <a href="https://github.com/ljharb/qs/issues?milestone=15&state=closed"><strong>2.3.0</strong></a>

- **#50** add option to omit array indices, closes #46

# <a href="https://github.com/ljharb/qs/issues?milestone=14&state=closed"><strong>2.2.5</strong></a>

- **#39** Is there an alternative to Buffer.isBuffer?
- **#49** refactor utils.merge, fixes #45
- **#41** avoid browserifying Buffer, for #39

# <a href="https://github.com/ljharb/qs/issues?milestone=13&state=closed"><strong>2.2.4</strong></a>

- **#38** how to handle object keys beginning with a number

# <a href="https://github.com/ljharb/qs/issues?milestone=12&state=closed"><strong>2.2.3</strong></a>

- **#37** parser discards first empty value in array
- **#36** Update to lab 4.x

# <a href="https://github.com/ljharb/qs/issues?milestone=11&state=closed"><strong>2.2.2</strong></a>

- **#33** Error when plain object in a value
- **#34** use Object.prototype.hasOwnProperty.call instead of obj.hasOwnProperty
- **#24** Changelog? Semver?

# <a href="https://github.com/ljharb/qs/issues?milestone=10&state=closed"><strong>2.2.1</strong></a>

- **#32** account for circular references properly, closes #31
- **#31** qs.parse stackoverflow on circular objects

# <a href="https://github.com/ljharb/qs/issues?milestone=9&state=closed"><strong>2.2.0</strong></a>

- **#26** Don't use Buffer global if it's not present
- **#30** Bug when merging non-object values into arrays
- **#29** Don't call Utils.clone at the top of Utils.merge
- **#23** Ability to not limit parameters?

# <a href="https://github.com/ljharb/qs/issues?milestone=8&state=closed"><strong>2.1.0</strong></a>

- **#22** Enable using a RegExp as delimiter

# <a href="https://github.com/ljharb/qs/issues?milestone=7&state=closed"><strong>2.0.0</strong></a>

- **#18** Why is there arrayLimit?
- **#20** Configurable parametersLimit
- **#21** make all limits optional, for #18, for #20

# <a href="https://github.com/ljharb/qs/issues?milestone=6&state=closed"><strong>1.2.2</strong></a>

- **#19** Don't overwrite null values

# <a href="https://github.com/ljharb/qs/issues?milestone=5&state=closed"><strong>1.2.1</strong></a>

- **#16** ignore non-string delimiters
- **#15** Close code block

# <a href="https://github.com/ljharb/qs/issues?milestone=4&state=closed"><strong>1.2.0</strong></a>

- **#12** Add optional delim argument
- **#13** fix #11: flattened keys in array are now correctly parsed

# <a href="https://github.com/ljharb/qs/issues?milestone=3&state=closed"><strong>1.1.0</strong></a>

- **#7** Empty values of a POST array disappear after being submitted
- **#9** Should not omit equals signs (=) when value is null
- **#6** Minor grammar fix in README

# <a href="https://github.com/ljharb/qs/issues?milestone=2&state=closed"><strong>1.0.2</strong></a>

- **#5** array holes incorrectly copied into object on large index