161 lines
4.8 KiB
Markdown
161 lines
4.8 KiB
Markdown
# Changelog
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> **Tags:**
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> - [New Feature]
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> - [Bug Fix]
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> - [Spec Compliancy]
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> - [Breaking Change]
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> - [Documentation]
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> - [Internal]
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> - [Polish]
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_Note: Gaps between patch versions are faulty/broken releases._
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See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
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## 4.6.1
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* **Bug Fix**
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* Fix generators in template directory being transformed.
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* Fix exposure of `util` for plugins.
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## 4.6.0
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* **New Feature**
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* Desugar sticky regexes to a new constructor expression so it can be handled by a polyfill.
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* **Spec Compliancy**
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* `for...of` now outputs in a lengthy `try...catch` this is to ensure spec compliancy in regards to iterator returns and abrupt completions. See [google/traceur-compiler#1773](https://github.com/google/traceur-compiler/issues/1773) and [babel/babel/#838](https://github.com/babel/babel/issues/838) for more information.
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* **Polish**
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* Rest parameters that are only refered to via number properties on member expressions are desugared into a direct `arguments` reference. Thanks [@neVERberleRfellerER](https://github.com/neVERberleRfellerER)!
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* `$ babel` no longer exits on syntax errors.
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* **Internal**
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* Upgrade `browserify`.
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* Upgrade `source-map`.
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* Publicly expose more internals.
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## 4.5.5
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* **Polish**
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* Delete old extensions when overriding them in `babel/register`.
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## 4.5.3
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* **Bug Fix**
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* Fix whitelisting logic for helper build script.
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## 4.5.2
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* **New Feature**
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* `returnUsedHelpers` option and add whitelist to `buildHelpers`.
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* **Bug Fix**
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* Fix function arity on self referencing inferred named functions.
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* **Internal**
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* Bump `acorn-babel`.
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* Start converting source to ES6...
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## 4.5.1
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**Babel now compiles itself!**
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## 4.5.0
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* **New Feature**
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* Add `.babelrc` support.
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* **Bug Fix**
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* Move use strict directives to the module formatter bodies.
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* **Internal**
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* Make default `bin/babel` behaviour to ignore non-compilable files and add a `--copy-files` flag to revert to the old behaviour.
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## 4.4.6
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* **Bug Fix**
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* Fix extending a class expression with no methods/only constructor. Thanks [@neVERberleRfellerER](https://github.com/neVERberleRfellerER)!
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* Allow `MemberExpression` as a valid `left` of `ForOfStatement`.
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* **Polish**
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* Throw an error when people try and transpile code with the `@jsx React.DOM` pragma as it conflicts with the custom jsx constructo method detection.
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* Crawl all comments for `@jsx` pragma.
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* **Internal**
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* Upgrade `chalk`.
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* Upgrade `core-js`.
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## 4.4.5
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* **Internal**
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* Remove function self reference optimisation.
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## 4.4.4
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* **Bug Fix**
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* Handle inferred function ids to be reassigned and deopt to a slower but working equivalent.
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* Don't unpack array patterns that have more elements than their right hand array expression.
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* **Polish**
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* Improve syntax highlighting in the code frame. Thanks [@lydell](https://github.com/lydell)!
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* **Internal**
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* Upgrade `acorn-babel`.
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## 4.4.3
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* **Bug Fix**
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* Fix `for...of` iterator break returns being duplicated.
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* Only call `return` on the iterator if it exists.
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* **Internal**
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* Rename `selfContained` transformer to `runtime`.
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## 4.4.2
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* **New Feature**
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* Add `moduleId` option for specifying a custom module id.
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## 4.4.0
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* **New Feature**
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* `/*** @jsx NAMESPACE **/` comments are now honored by the `react` transformer.
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* `getModuleName` option.
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* Infer function expression names. Thanks [@RReverser](https://github.com/RReverser)!
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* **Bug Fix**
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* Add proper control flow for tail recursion optimisation.
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* **Internal**
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* Remove useless `format` options and move the `format.compact` option to `format`.
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* **Polish**
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* Newline handling of the code generator has been heavily improved.
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* Code generator now deopts whitespace if the input size is >100KB.
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## 4.3.0
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* **Breaking Change**
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* Remove `commonStandard` module formatter and make it the default behaviour of all the strict module formatters.
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## 4.2.1
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* **Polish**
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* Add auxiliary comment to let scoping closure flow control.
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## 4.2.0
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* **Polish**
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* Use an assignment instead of a define for `__esModule` in loose mode.
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* **Internal**
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* Add error for `eval();` usage and enable strict mode for parsing.
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## 4.1.0
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* **New Feature**
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* Add `BABEL_CACHE_PATH` and `BABEL_DISABLE_CACHE` environment variables.
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* **Internal**
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* Replace many internal util functions with modules. Thanks [@sindresorhus](https://github.com/sindresorhus)!
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## 4.0.2
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* **Bug Fix**
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* Fix generators not properly propagating their internal declarations.
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* **Polish**
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* Update setter param length error message.
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* Use ranges on dependencies.
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## 4.0.0
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* 6to5 is now known as Babel.
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* Global helpers/runtime has now been given the more descriptive name of "external helpers".
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