babel/.github/CHANGELOG-v4.md

Babel v4 Changelog

4.7.16

• Bug Fix
• Fix constructor spreading of typed arrays.
• Fix break/continue/return aliasing of non-loops in block scoping transformer.

4.7.15

• Bug Fix
• Fix constructor spreading of collections.

4.7.14

• Bug Fix
• Fix constructor spreading of Promise.
• Internal
• Deprecate remaining playground transformers and abstract references.

4.7.13

• Bug Fix
• Handle comments on use strict directives.
• Fix assignment patterns with a left side pattern.
• Polish
• Special case this when doing expression memoisation.

4.7.12

• Bug Fix
• Deprecate playground.methodBinding.

4.7.11

• Bug Fix
• Fix unicode regexes stripping their unicode flag before being passed on two regexpu.

4.7.10

• Internal
• Deprecate playground.methodBinding and playground.objectGetterMemoization.
• Bug Fix
• Fix inputSourceMap option. Thanks @Rich-Harris!

4.7.9

• 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.

4.7.8

• Bug Fix
• Fix computed classes not properly setting symbols.

4.7.7

• Bug Fix
• Fix types API exposure.

4.7.6

• 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.

4.7.5

• Bug Fix
• Don't remap breaks 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.

4.7.4

• 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.

4.7.2

• New Feature
• "both" option for sourceMap.
• Add output types to external helpers. Thanks @neVERberleRfellerER!
• Bug Fix
• Fix node duplication sometimes resulting in a recursion error.
• Ignore breaks within cases inside for...of.
• Polish
• Split up variable declarations and export declarations to allow easier transformation.

4.7.0

• 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 Compliance
• Make it illegal to use a rest parameter on a setter.

4.6.6

• Bug Fix
• Fix incorrect method call in utility.deadCodeElimination transformer.
• Fix es6.blockScopingTDZ transformer duplicating binding nodes.

4.6.5

• Internal
• useStrict transformer has been renamed to strict.

4.6.4

• Bug Fix
• Fix ForOfStatement not properly inheriting labels.
• When in closure mode in block scoping transformer, properly check for variable shadowing.
• New Feature
• New utility.inlineEnvironmentVariables and utility.inlineExpression transformers.

4.6.3

• 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.

4.6.1

• Bug Fix
• Fix generators in template directory being transformed.
• Fix exposure of util for plugins.

4.6.0

• New Feature
• Desugar sticky regexes to a new constructor expression so it can be handled by a polyfill.
• Spec Compliance
• for...of now outputs in a lengthy try...catch this is to ensure spec compliance in regards to iterator returns and abrupt completions. See google/traceur-compiler#1773 and babel/babel/#838 for more information.
• Polish
• Rest parameters that are only referred to via number properties on member expressions are desugared into a direct arguments reference. Thanks @neVERberleRfellerER!
• $ babel no longer exits on syntax errors.
• Internal
• Upgrade browserify.
• Upgrade source-map.
• Publicly expose more internals.

4.5.5

• Polish
• Delete old extensions when overriding them in babel/register.

4.5.3

• Bug Fix
• Fix whitelisting logic for helper build script.

4.5.2

• 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...

4.5.1

Babel now compiles itself!

4.5.0

• 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.

4.4.6

• Bug Fix
• Fix extending a class expression with no methods/only constructor. Thanks @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.

4.4.5

• Internal
• Remove function self reference optimisation.

4.4.4

• 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!
• Internal
• Upgrade acorn-babel.

4.4.3

• 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.

4.4.2

• New Feature
• Add moduleId option for specifying a custom module id.

4.4.0

• New Feature
• /*** @jsx NAMESPACE **/ comments are now honored by the react transformer.
• getModuleName option.
• Infer function expression names. Thanks @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.

4.3.0

• Breaking Change
• Remove commonStandard module formatter and make it the default behaviour of all the strict module formatters.

4.2.1

• Polish
• Add auxiliary comment to let scoping closure flow control.

4.2.0

• 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.

4.1.0

• New Feature
• Add BABEL_CACHE_PATH and BABEL_DISABLE_CACHE environment variables.
• Internal
• Replace many internal util functions with modules. Thanks @sindresorhus!

4.0.2

• Bug Fix
• Fix generators not properly propagating their internal declarations.
• Polish
• Update setter param length error message.
• Use ranges on dependencies.

4.0.0

• 6to5 is now known as Babel.
• Global helpers/runtime has now been given the more descriptive name of "external helpers".