# Change Log
All notable changes to this project will be documented in this file.
See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
## [4.0.3](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@4.0.2...istanbul-lib-instrument@4.0.3) (2020-05-09)
### Bug Fixes
* Prevent readInitialCoverage from reading babel config ([#562](https://github.com/istanbuljs/istanbuljs/issues/562)) ([49b4745](https://github.com/istanbuljs/istanbuljs/commit/49b474525c15e703642916011bd86f663aca0c3d))
## [4.0.2](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@4.0.1...istanbul-lib-instrument@4.0.2) (2020-05-06)
### Bug Fixes
* Add ts-ignore to reassignment of generated function ([#557](https://github.com/istanbuljs/istanbuljs/issues/557)) ([817efb0](https://github.com/istanbuljs/istanbuljs/commit/817efb04fc161efae426b2231a0221606b09f559))
* Use @babel/core for all babel imports. ([#555](https://github.com/istanbuljs/istanbuljs/issues/555)) ([a99a13e](https://github.com/istanbuljs/istanbuljs/commit/a99a13ee6931fc124a2a723c3f511cdbcb0aa81d))
## [4.0.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@4.0.0...istanbul-lib-instrument@4.0.1) (2020-02-03)
### Bug Fixes
* Always call coverage initialization function ([#524](https://github.com/istanbuljs/istanbuljs/issues/524)) ([c6536c1](https://github.com/istanbuljs/istanbuljs/commit/c6536c14bf0663ca7e0493dd40ea132b05352594))
# [4.0.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@4.0.0-alpha.3...istanbul-lib-instrument@4.0.0) (2019-12-20)
**Note:** Version bump only for package istanbul-lib-instrument
# [4.0.0-alpha.3](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@4.0.0-alpha.2...istanbul-lib-instrument@4.0.0-alpha.3) (2019-12-07)
**Note:** Version bump only for package istanbul-lib-instrument
# [4.0.0-alpha.2](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@4.0.0-alpha.1...istanbul-lib-instrument@4.0.0-alpha.2) (2019-11-01)
### Bug Fixes
* Produce properly merged source-maps when inputSourceMap is provided ([#487](https://github.com/istanbuljs/istanbuljs/issues/487)) ([8f8c88e](https://github.com/istanbuljs/istanbuljs/commit/8f8c88e3a2add4c08729e41e356aa7981dc69d4d))
# [4.0.0-alpha.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@4.0.0-alpha.0...istanbul-lib-instrument@4.0.0-alpha.1) (2019-10-06)
### Bug Fixes
* Eliminate babel hoisting of the coverage variable ([#481](https://github.com/istanbuljs/istanbuljs/issues/481)) ([8dfbcba](https://github.com/istanbuljs/istanbuljs/commit/8dfbcba)), closes [#92](https://github.com/istanbuljs/istanbuljs/issues/92)
* Honor ignore hints in chained if statements ([#469](https://github.com/istanbuljs/istanbuljs/issues/469)) ([a629770](https://github.com/istanbuljs/istanbuljs/commit/a629770)), closes [#468](https://github.com/istanbuljs/istanbuljs/issues/468)
* Populate lastFileCoverage for already instrumented files ([#470](https://github.com/istanbuljs/istanbuljs/issues/470)) ([ea6d779](https://github.com/istanbuljs/istanbuljs/commit/ea6d779)), closes [istanbuljs/nyc#594](https://github.com/istanbuljs/nyc/issues/594)
### Features
* Use @istanbuljs/schema to pull defaults ([#485](https://github.com/istanbuljs/istanbuljs/issues/485)) ([87e27f3](https://github.com/istanbuljs/istanbuljs/commit/87e27f3)), closes [#460](https://github.com/istanbuljs/istanbuljs/issues/460)
### BREAKING CHANGES
* The defaults for `autoWrap`, `preserveComments`,
`esModules` and `produceSourceMap` are now true. This applies only to
the stand-alone instrumenter, the visitor does not use these options.
* The `flow` and `jsx` parser plugins are no longer
enabled by default. This applies only to the stand-alone instrumenter,
the visitor does not use this option.
* The `plugins` option of the stand-alone instrumenter
has been renamed to `parserPlugins` to match nyc.
# [4.0.0-alpha.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@3.3.0...istanbul-lib-instrument@4.0.0-alpha.0) (2019-06-19)
### Features
* Update dependencies, require Node.js 8 ([#401](https://github.com/istanbuljs/istanbuljs/issues/401)) ([bf3a539](https://github.com/istanbuljs/istanbuljs/commit/bf3a539))
### BREAKING CHANGES
* Node.js 8 is now required
# [3.3.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@3.2.0...istanbul-lib-instrument@3.3.0) (2019-04-24)
### Features
* Enable classProperties and classPrivateProperties parsers and coverage. ([#379](https://github.com/istanbuljs/istanbuljs/issues/379)) ([c09dc38](https://github.com/istanbuljs/istanbuljs/commit/c09dc38))
# [3.2.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@3.1.2...istanbul-lib-instrument@3.2.0) (2019-04-09)
### Features
* Add bigInt and importMeta to default parser plugins. ([#356](https://github.com/istanbuljs/istanbuljs/issues/356)) ([fb4d6ed](https://github.com/istanbuljs/istanbuljs/commit/fb4d6ed)), closes [#338](https://github.com/istanbuljs/istanbuljs/issues/338)
## [3.1.2](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@3.1.1...istanbul-lib-instrument@3.1.2) (2019-04-03)
### Bug Fixes
* Be more friendly to ts-node. ([#352](https://github.com/istanbuljs/istanbuljs/issues/352)) ([40d15f5](https://github.com/istanbuljs/istanbuljs/commit/40d15f5)), closes [#336](https://github.com/istanbuljs/istanbuljs/issues/336)
## [3.1.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@3.1.0...istanbul-lib-instrument@3.1.1) (2019-03-12)
### Bug Fixes
* Honor istanbul ignore next hints placed before export statement. ([#298](https://github.com/istanbuljs/istanbuljs/issues/298)) ([f24795d](https://github.com/istanbuljs/istanbuljs/commit/f24795d)), closes [#297](https://github.com/istanbuljs/istanbuljs/issues/297)
# [3.1.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@3.0.1...istanbul-lib-instrument@3.1.0) (2019-01-26)
### Features
* dont skip for loop initialization instrumentation ([#188](https://github.com/istanbuljs/istanbuljs/issues/188)) ([2e0258e](https://github.com/istanbuljs/istanbuljs/commit/2e0258e))
* New options coverageGlobalScope and coverageGlobalScopeFunc. ([#200](https://github.com/istanbuljs/istanbuljs/issues/200)) ([25509c7](https://github.com/istanbuljs/istanbuljs/commit/25509c7)), closes [#199](https://github.com/istanbuljs/istanbuljs/issues/199)
## [3.0.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@3.0.0...istanbul-lib-instrument@3.0.1) (2018-12-25)
**Note:** Version bump only for package istanbul-lib-instrument
# [3.0.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.3.2...istanbul-lib-instrument@3.0.0) (2018-09-06)
### Chores
* Update test for babel 7. ([#218](https://github.com/istanbuljs/istanbuljs/issues/218)) ([9cf4d43](https://github.com/istanbuljs/istanbuljs/commit/9cf4d43)), closes [#205](https://github.com/istanbuljs/istanbuljs/issues/205)
### Features
* Add option plugins ([#205](https://github.com/istanbuljs/istanbuljs/issues/205)) ([312f81f](https://github.com/istanbuljs/istanbuljs/commit/312f81f))
* Update babel to 7.0.0. ([#215](https://github.com/istanbuljs/istanbuljs/issues/215)) ([8a96613](https://github.com/istanbuljs/istanbuljs/commit/8a96613))
### BREAKING CHANGES
* was added which requires an option for the `decorators`
plugin. Add it to get tests working again, commit updated api.md.
## [2.3.2](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.3.1...istanbul-lib-instrument@2.3.2) (2018-07-24)
**Note:** Version bump only for package istanbul-lib-instrument
## [2.3.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.3.0...istanbul-lib-instrument@2.3.1) (2018-07-07)
### Bug Fixes
* Don't ignore src/visitor.js for self test. ([#194](https://github.com/istanbuljs/istanbuljs/issues/194)) ([71b815d](https://github.com/istanbuljs/istanbuljs/commit/71b815d))
# [2.3.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.2.1...istanbul-lib-instrument@2.3.0) (2018-06-27)
### Features
* update pinned babel version to latest release. ([#189](https://github.com/istanbuljs/istanbuljs/issues/189)) ([ac8ec07](https://github.com/istanbuljs/istanbuljs/commit/ac8ec07))
## [2.2.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.2.0...istanbul-lib-instrument@2.2.1) (2018-06-26)
### Bug Fixes
* Instrument ObjectMethod's. ([#182](https://github.com/istanbuljs/istanbuljs/issues/182)) ([126f09d](https://github.com/istanbuljs/istanbuljs/commit/126f09d))
* update default args test guard to work on supported versions. ([#185](https://github.com/istanbuljs/istanbuljs/issues/185)) ([955511a](https://github.com/istanbuljs/istanbuljs/commit/955511a))
# [2.2.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.0.2...istanbul-lib-instrument@2.2.0) (2018-06-06)
### Features
* add support for optional catch binding ([#175](https://github.com/istanbuljs/istanbuljs/issues/175)) ([088dd9f](https://github.com/istanbuljs/istanbuljs/commit/088dd9f))
# [2.1.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.0.2...istanbul-lib-instrument@2.1.0) (2018-05-31)
### Features
* add support for optional catch binding ([#175](https://github.com/istanbuljs/istanbuljs/issues/175)) ([088dd9f](https://github.com/istanbuljs/istanbuljs/commit/088dd9f))
## [2.0.2](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.0.1...istanbul-lib-instrument@2.0.2) (2018-05-31)
**Note:** Version bump only for package istanbul-lib-instrument
## [2.0.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@2.0.0...istanbul-lib-instrument@2.0.1) (2018-05-31)
### Bug Fixes
* should import [@babel](https://github.com/babel)/template ([85a0d1a](https://github.com/istanbuljs/istanbuljs/commit/85a0d1a))
# [2.0.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.10.1...istanbul-lib-instrument@2.0.0) (2018-05-31)
### Bug Fixes
* parenthesize superClass on non-idetifier case ([#158](https://github.com/istanbuljs/istanbuljs/issues/158)) ([6202c88](https://github.com/istanbuljs/istanbuljs/commit/6202c88))
### Chores
* upgrade babel in instrumenter ([#174](https://github.com/istanbuljs/istanbuljs/issues/174)) ([ce23e91](https://github.com/istanbuljs/istanbuljs/commit/ce23e91))
### BREAKING CHANGES
* babel@7 drops Node@4 support
## [1.10.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.10.0...istanbul-lib-instrument@1.10.1) (2018-03-09)
### Bug Fixes
* default value for ignorelassMethods ([#151](https://github.com/istanbuljs/istanbuljs/issues/151)) ([5dd88e8](https://github.com/istanbuljs/istanbuljs/commit/5dd88e8))
# [1.10.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.9.2...istanbul-lib-instrument@1.10.0) (2018-03-04)
### Features
* allows an array of ignored method names to be provided ([#127](https://github.com/istanbuljs/istanbuljs/issues/127)) ([67918e2](https://github.com/istanbuljs/istanbuljs/commit/67918e2))
## [1.9.2](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.9.1...istanbul-lib-instrument@1.9.2) (2018-02-13)
### Bug Fixes
* compatibility with babel 7 ([#135](https://github.com/istanbuljs/istanbuljs/issues/135)) ([6cac849](https://github.com/istanbuljs/istanbuljs/commit/6cac849))
* handle instrumentation when a function is called Function ([#131](https://github.com/istanbuljs/istanbuljs/issues/131)) ([b12a07e](https://github.com/istanbuljs/istanbuljs/commit/b12a07e))
* proper passing of the preserveComments option to babel ([#122](https://github.com/istanbuljs/istanbuljs/issues/122)) ([470bb0e](https://github.com/istanbuljs/istanbuljs/commit/470bb0e))
* update instrument, account for lack of arrow expression ([#119](https://github.com/istanbuljs/istanbuljs/issues/119)) ([#125](https://github.com/istanbuljs/istanbuljs/issues/125)) ([0968206](https://github.com/istanbuljs/istanbuljs/commit/0968206))
## [1.9.1](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.9.0...istanbul-lib-instrument@1.9.1) (2017-10-22)
### Bug Fixes
* address issue with class instrumentation ([#111](https://github.com/istanbuljs/istanbuljs/issues/111)) ([cbd1c14](https://github.com/istanbuljs/istanbuljs/commit/cbd1c14))
# [1.9.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.8.0...istanbul-lib-instrument@1.9.0) (2017-10-21)
### Bug Fixes
* support conditional expression for superClass ([#106](https://github.com/istanbuljs/istanbuljs/issues/106)) ([aae256f](https://github.com/istanbuljs/istanbuljs/commit/aae256f))
### Features
* add support for ignoring entire files ([#108](https://github.com/istanbuljs/istanbuljs/issues/108)) ([f12da65](https://github.com/istanbuljs/istanbuljs/commit/f12da65))
# [1.8.0](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.7.5...istanbul-lib-instrument@1.8.0) (2017-09-05)
### Features
* add support for object-spread syntax ([#82](https://github.com/istanbuljs/istanbuljs/issues/82)) ([28d5566](https://github.com/istanbuljs/istanbuljs/commit/28d5566))
## [1.7.5](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.7.4...istanbul-lib-instrument@1.7.5) (2017-08-23)
### Bug Fixes
* name of function is now preserved or named exports ([#79](https://github.com/istanbuljs/istanbuljs/issues/79)) ([2ce8974](https://github.com/istanbuljs/istanbuljs/commit/2ce8974))
## [1.7.4](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.7.3...istanbul-lib-instrument@1.7.4) (2017-07-16)
### Bug Fixes
* update increment operator to appropriate expression type ([#74](https://github.com/istanbuljs/istanbuljs/issues/74)) ([dc69e66](https://github.com/istanbuljs/istanbuljs/commit/dc69e66))
## [1.7.3](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.7.2...istanbul-lib-instrument@1.7.3) (2017-06-25)
## [1.7.2](https://github.com/istanbuljs/istanbuljs/compare/istanbul-lib-instrument@1.7.1...istanbul-lib-instrument@1.7.2) (2017-05-27)
### Bug Fixes
* hoist statement counter for class variables, so that name is preserved ([#60](https://github.com/istanbuljs/istanbuljs/issues/60)) ([120d221](https://github.com/istanbuljs/istanbuljs/commit/120d221))
## [1.7.1](https://github.com/istanbuljs/istanbul-lib-instrument/compare/istanbul-lib-instrument@1.7.0...istanbul-lib-instrument@1.7.1) (2017-04-29)
### Bug Fixes
* don't instrument a file if it has already been instrumented ([#38](https://github.com/istanbuljs/istanbuljs/issues/38)) ([9c38e4e](https://github.com/istanbuljs/istanbul-lib-instrument/commit/9c38e4e))
# [1.7.0](https://github.com/istanbuljs/istanbul-lib-instrument/compare/istanbul-lib-instrument@1.6.2...istanbul-lib-instrument@1.7.0) (2017-03-27)
### Features
* use extended babylon support; adding features such as jsx ([#22](https://github.com/istanbuljs/istanbuljs/issues/22)) ([11c2438](https://github.com/istanbuljs/istanbul-lib-instrument/commit/11c2438))
## [1.6.2](https://github.com/istanbuljs/istanbul-lib-instrument/compare/istanbul-lib-instrument@1.6.1...istanbul-lib-instrument@1.6.2) (2017-03-22)
### Bug Fixes
* loc is sometimes not defined, so loc.start fails see [#99](https://github.com/istanbuljs/istanbuljs/issues/99) ([#18](https://github.com/istanbuljs/istanbuljs/issues/18)) ([df85ba6](https://github.com/istanbuljs/istanbul-lib-instrument/commit/df85ba6))
## [1.6.1](https://github.com/istanbuljs/istanbul-lib-instrument/compare/istanbul-lib-instrument@1.6.0...istanbul-lib-instrument@1.6.1) (2017-03-21)
# [1.6.0](https://github.com/istanbuljs/istanbul-lib-instrument/compare/istanbul-lib-instrument@1.4.2...istanbul-lib-instrument@1.6.0) (2017-03-21)
### Features
* adds line number property back to coverage.json ([b03b927](https://github.com/istanbuljs/istanbul-lib-instrument/commit/b03b927))
## [1.4.2](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.4.1...v1.4.2) (2017-01-04)
### Bug Fixes
* only hoist counter for a smaller subset of function declarations ([9f8931e](https://github.com/istanbuljs/istanbul-lib-instrument/commit/9f8931e))
## [1.4.1](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.4.0...v1.4.1) (2017-01-04)
### Bug Fixes
* address regression discussed in https://github.com/istanbuljs/babel-plugin-istanbul/issues/78 ([#40](https://github.com/istanbuljs/istanbul-lib-instrument/issues/40)) ([7f458a3](https://github.com/istanbuljs/istanbul-lib-instrument/commit/7f458a3))
# [1.4.0](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.3.1...v1.4.0) (2017-01-02)
### Features
* preserve inferred function names ([#38](https://github.com/istanbuljs/istanbul-lib-instrument/issues/38)) ([312666e](https://github.com/istanbuljs/istanbul-lib-instrument/commit/312666e))
## [1.3.1](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.3.0...v1.3.1) (2016-12-27)
### Bug Fixes
* function declaration assignment now retains function name ([#33](https://github.com/istanbuljs/istanbul-lib-instrument/issues/33)) ([2d781da](https://github.com/istanbuljs/istanbul-lib-instrument/commit/2d781da))
# [1.3.0](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.2.0...v1.3.0) (2016-11-10)
### Features
* allow an input source-map to be passed to instrumentSync() ([#23](https://github.com/istanbuljs/istanbul-lib-instrument/issues/23)) ([b08e4f5](https://github.com/istanbuljs/istanbul-lib-instrument/commit/b08e4f5))
# [1.2.0](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.1.4...v1.2.0) (2016-10-25)
### Features
* implement function to extract empty coverage data from an instrumented file ([#28](https://github.com/istanbuljs/istanbul-lib-instrument/issues/28)) ([06d0ef6](https://github.com/istanbuljs/istanbul-lib-instrument/commit/06d0ef6))
## [1.1.4](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.1.3...v1.1.4) (2016-10-17)
### Bug Fixes
* hoist coverage variable to very top of file ([#26](https://github.com/istanbuljs/istanbul-lib-instrument/issues/26)) ([0225e8c](https://github.com/istanbuljs/istanbul-lib-instrument/commit/0225e8c))
## [1.1.3](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.1.2...v1.1.3) (2016-09-13)
### Performance Improvements
* simplify coverage variable naming https://github.com/istanbuljs/istanbul-lib-instrument/pull/24 ([7252aae](https://github.com/istanbuljs/istanbul-lib-instrument/commit/7252aae))
## [1.1.2](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.1.1...v1.1.2) (2016-09-08)
### Performance Improvements
* use zero-based numeric indices for much faster instrumented code ([#22](https://github.com/istanbuljs/istanbul-lib-instrument/issues/22)) ([5b401f5](https://github.com/istanbuljs/istanbul-lib-instrument/commit/5b401f5))
## [1.1.1](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.1.0...v1.1.1) (2016-08-30)
### Bug Fixes
* upgrade istanbul-lib-coverage ([eb9b1f6](https://github.com/istanbuljs/istanbul-lib-instrument/commit/eb9b1f6))
# [1.1.0](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.1.0-alpha.4...v1.1.0) (2016-08-11)
### Bug Fixes
* guard against invalid loc ([#16](https://github.com/istanbuljs/istanbul-lib-instrument/issues/16)) ([23ebfc3](https://github.com/istanbuljs/istanbul-lib-instrument/commit/23ebfc3))
# [1.1.0-alpha.4](https://github.com/istanbuljs/istanbul-lib-instrument/compare/v1.0.0-alpha.5...v1.1.0-alpha.4) (2016-07-20)
### Bug Fixes
* require more performant babel-generator ([#15](https://github.com/istanbuljs/istanbul-lib-instrument/issues/15)) ([21b2563](https://github.com/istanbuljs/istanbul-lib-instrument/commit/21b2563))