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# Babel v4 Changelog | ||
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## 4.7.16 | ||
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* **Bug Fix** | ||
* Fix constructor spreading of typed arrays. | ||
* Fix break/continue/return aliasing of non-loops in block scoping transformer. | ||
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## 4.7.15 | ||
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* **Bug Fix** | ||
* Fix constructor spreading of collections. | ||
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## 4.7.14 | ||
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* **Bug Fix** | ||
* Fix constructor spreading of `Promise`. | ||
* **Internal** | ||
* Deprecate remaining playground transformers and abstract references. | ||
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## 4.7.13 | ||
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* **Bug Fix** | ||
* Handle comments on use strict directives. | ||
* Fix assignment patterns with a left side pattern. | ||
* **Polish** | ||
* Special case `this` when doing expression memoisation. | ||
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## 4.7.12 | ||
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* **Bug Fix** | ||
* Deprecate `playground.methodBinding`. | ||
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## 4.7.11 | ||
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* **Bug Fix** | ||
* Fix unicode regexes stripping their unicode flag before being passed on two `regexpu`. | ||
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## 4.7.10 | ||
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* **Internal** | ||
* Deprecate `playground.methodBinding` and `playground.objectGetterMemoization`. | ||
* **Bug Fix** | ||
* Fix `inputSourceMap` option. Thanks [@Rich-Harris](https://github.com/Rich-Harris)! | ||
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## 4.7.9 | ||
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* **Polish** | ||
* Allow `inputSourceMap` to be set to `false` to skip the source map inference. | ||
* Infer computed literal property names. | ||
* **Bug Fix** | ||
* Fix nested labeled for-ofs. | ||
* Fix block scoping `break` colliding with the parent switch case. | ||
* **Internal** | ||
* Upgrade `acorn-babel`. | ||
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## 4.7.8 | ||
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* **Bug Fix** | ||
* Fix computed classes not properly setting symbols. | ||
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## 4.7.7 | ||
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* **Bug Fix** | ||
* Fix `types` API exposure. | ||
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## 4.7.6 | ||
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* **Bug Fix** | ||
* Fix non-Identifier/Literal computed class methods. | ||
* **Polish** | ||
* Add a fallback if `stack` on an error is unconfigurable. | ||
* Hoist `esModule` module declarations to the top of the file to handle circular dependencies better. | ||
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## 4.7.5 | ||
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* **Bug Fix** | ||
* Don't remap` break`s to call the iterator return. | ||
* **Polish** | ||
* Use a different helper for computed classes for much nicer output. Also fixes a bug in symbols being non-enumerable so they wouldn't be set on the class. | ||
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## 4.7.4 | ||
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* **Bug Fix** | ||
* Rewrite named function expressions in optional async function transformers. | ||
* Hoist directives. | ||
* Remove `Number` from the list of valid `runtime` constructors. | ||
* **Internal** | ||
* `spec.typeofSymbol` transformer has been renamed to `es6.symbols`. | ||
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## 4.7.2 | ||
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* **New Feature** | ||
* `"both"` option for `sourceMap`. | ||
* Add output types to external helpers. Thanks [@neVERberleRfellerER](https://github.com/neVERberleRfellerER)! | ||
* **Bug Fix** | ||
* Fix node duplication sometimes resulting in a recursion error. | ||
* Ignore `break`s within cases inside `for...of`. | ||
* **Polish** | ||
* Split up variable declarations and export declarations to allow easier transformation. | ||
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## 4.7.0 | ||
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* **Bug Fix** | ||
* Add `alternate` to list of `STATEMENT_OR_BLOCK` keys. | ||
* Add support for module specifiers to `t.isReferenced`. | ||
* **New Feature** | ||
* Add `inputSourceMap` option. | ||
* **Polish** | ||
* Throw an error on different `babel` and `babel-runtime` versions. | ||
* Replicate module environment for `babel-node` eval. | ||
* Clean up classes output. | ||
* **Spec Compliancy** | ||
* Make it illegal to use a rest parameter on a setter. | ||
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## 4.6.6 | ||
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* **Bug Fix** | ||
* Fix incorrect method call in `utility.deadCodeElimination` transformer. | ||
* Fix `es6.blockScopingTDZ` transformer duplicating binding nodes. | ||
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## 4.6.5 | ||
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* **Internal** | ||
* `useStrict` transformer has been renamed to `strict`. | ||
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## 4.6.4 | ||
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* **Bug Fix** | ||
* Fix `ForOfStatement` not proplery inheriting labels. | ||
* When in closure mode in block scoping transformer, properly check for variable shadowing. | ||
* **New Feature** | ||
* New `utility.inlineEnvironmentVariables` and `utility.inlineExpression` transformers. | ||
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## 4.6.3 | ||
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* **Bug Fix** | ||
* Fix `arguments` being incorrectly aliased in arrow function rest parameter optimisation. | ||
* Make deoptimisation trigger safer. | ||
* **New Feature** | ||
* Flow types are now retained when blacklisting the `flow` transformer. | ||
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## 4.6.1 | ||
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* **Bug Fix** | ||
* Fix generators in template directory being transformed. | ||
* Fix exposure of `util` for plugins. | ||
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## 4.6.0 | ||
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* **New Feature** | ||
* Desugar sticky regexes to a new constructor expression so it can be handled by a polyfill. | ||
* **Spec Compliancy** | ||
* `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. | ||
* **Polish** | ||
* 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)! | ||
* `$ babel` no longer exits on syntax errors. | ||
* **Internal** | ||
* Upgrade `browserify`. | ||
* Upgrade `source-map`. | ||
* Publicly expose more internals. | ||
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## 4.5.5 | ||
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* **Polish** | ||
* Delete old extensions when overriding them in `babel/register`. | ||
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## 4.5.3 | ||
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* **Bug Fix** | ||
* Fix whitelisting logic for helper build script. | ||
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## 4.5.2 | ||
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* **New Feature** | ||
* `returnUsedHelpers` option and add whitelist to `buildHelpers`. | ||
* **Bug Fix** | ||
* Fix function arity on self referencing inferred named functions. | ||
* **Internal** | ||
* Bump `acorn-babel`. | ||
* Start converting source to ES6... | ||
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## 4.5.1 | ||
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**Babel now compiles itself!** | ||
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![holy shit](http://gifsec.com/wp-content/uploads/GIF/2014/03/OMG-GIF_2.gif) | ||
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## 4.5.0 | ||
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* **New Feature** | ||
* Add `.babelrc` support. | ||
* **Bug Fix** | ||
* Move use strict directives to the module formatter bodies. | ||
* **Internal** | ||
* 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** | ||
* Fix extending a class expression with no methods/only constructor. Thanks [@neVERberleRfellerER](https://github.com/neVERberleRfellerER)! | ||
* Allow `MemberExpression` as a valid `left` of `ForOfStatement`. | ||
* **Polish** | ||
* 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. | ||
* Crawl all comments for `@jsx` pragma. | ||
* **Internal** | ||
* Upgrade `chalk`. | ||
* Upgrade `core-js`. | ||
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## 4.4.5 | ||
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* **Internal** | ||
* Remove function self reference optimisation. | ||
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## 4.4.4 | ||
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* **Bug Fix** | ||
* Handle inferred function ids to be reassigned and deopt to a slower but working equivalent. | ||
* Don't unpack array patterns that have more elements than their right hand array expression. | ||
* **Polish** | ||
* Improve syntax highlighting in the code frame. Thanks [@lydell](https://github.com/lydell)! | ||
* **Internal** | ||
* Upgrade `acorn-babel`. | ||
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## 4.4.3 | ||
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* **Bug Fix** | ||
* Fix `for...of` iterator break returns being duplicated. | ||
* Only call `return` on the iterator if it exists. | ||
* **Internal** | ||
* Rename `selfContained` transformer to `runtime`. | ||
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## 4.4.2 | ||
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* **New Feature** | ||
* Add `moduleId` option for specifying a custom module id. | ||
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## 4.4.0 | ||
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* **New Feature** | ||
* `/*** @jsx NAMESPACE **/` comments are now honored by the `react` transformer. | ||
* `getModuleName` option. | ||
* Infer function expression names. Thanks [@RReverser](https://github.com/RReverser)! | ||
* **Bug Fix** | ||
* Add proper control flow for tail recursion optimisation. | ||
* **Internal** | ||
* Remove useless `format` options and move the `format.compact` option to `format`. | ||
* **Polish** | ||
* Newline handling of the code generator has been heavily improved. | ||
* Code generator now deopts whitespace if the input size is >100KB. | ||
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## 4.3.0 | ||
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* **Breaking Change** | ||
* 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** | ||
* Add auxiliary comment to let scoping closure flow control. | ||
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## 4.2.0 | ||
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* **Polish** | ||
* Use an assignment instead of a define for `__esModule` in loose mode. | ||
* **Internal** | ||
* Add error for `eval();` usage and enable strict mode for parsing. | ||
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## 4.1.0 | ||
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* **New Feature** | ||
* Add `BABEL_CACHE_PATH` and `BABEL_DISABLE_CACHE` environment variables. | ||
* **Internal** | ||
* 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** | ||
* Fix generators not properly propagating their internal declarations. | ||
* **Polish** | ||
* Update setter param length error message. | ||
* Use ranges on dependencies. | ||
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## 4.0.0 | ||
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* 6to5 is now known as Babel. | ||
* Global helpers/runtime has now been given the more descriptive name of "external helpers". |
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