babel/CHANGELOG.md

Changelog

Tags:

• [Breaking Change]
• [Spec Compliancy]
• [New Feature]
• [Bug Fix]
• [Documentation]
• [Internal]
• [Polish]

Note: Gaps between patch versions are faulty, broken or test releases.

See the Babel Changelog for the pre-6.8.0 version changelog.

6.9.1 (2016-08-23)

This release contains mainly small bugfixes but also updates babylons default mode to es2017. The features for exponentiationOperator, asyncFunctions and trailingFunctionCommas which previously needed to be activated via plugin are now enabled by default and the plugins are now no-ops.

Bug Fixes

• Fix issues with default object params in async functions (#96) @danez
• Fix issues with flow-types and async function (#95) @danez
• Fix arrow functions with destructuring, types & default value (#94) @danharper
• Fix declare class with qualified type identifier (#97) @danez
• Remove exponentiationOperator, asyncFunctions, trailingFunctionCommas plugins and enable them by default (#98) @danez

6.9.0 (2016-08-16)

New syntax support

• Add JSX spread children (#42) @calebmer

(Be aware that React is not going to support this syntax)

<div>
  {...todos.map(todo => <Todo key={todo.id} todo={todo}/>)}
</div>

• Add support for declare module.exports (#72) @danez

declare module "foo" {
  declare module.exports: {}
}

New Features

• If supplied, attach filename property to comment node loc. (#80) @divmain
• Add identifier name to node loc field (#90) @kittens

Bug Fixes

• Fix exponential operator to behave according to spec (#75) @danez
• Fix lookahead to not add comments to arrays which are not cloned (#76) @danez
• Fix accidental fall-through in Flow type parsing. (#82) @xiemaisi
• Only allow declares inside declare module (#73) @danez
• Small fix for parsing type parameter declarations (#83) @gabelevi
• Fix arrow param locations with flow types (#57) @danez
• Fixes SyntaxError position with flow optional type (#65) @danez

Internal

• Add codecoverage to tests @danez
• Fix tests to not save expected output if we expect the test to fail @danez
• Make a shallow clone of babel for testing @danez
• chore(package): update cross-env to version 2.0.0 (#77) @greenkeeperio-bot
• chore(package): update ava to version 0.16.0 (#86) @greenkeeperio-bot
• chore(package): update babel-plugin-istanbul to version 2.0.0 (#89) @greenkeeperio-bot
• chore(package): update nyc to version 8.0.0 (#88) @greenkeeperio-bot

6.8.4 (2016-07-06)

Bug Fixes

• Fix the location of params, when flow and default value used (#68) @danez

6.8.3 (2016-07-02)

Bug Fixes

• Fix performance regression introduced in 6.8.2 with conditionals (#63) @danez

6.8.2 (2016-06-24)

Bug Fixes

• Fix parse error with yielding jsx elements in generators function* it() { yield <a></a>; } (#31) @eldereal
• When cloning nodes do not clone its comments (#24) @danez
• Fix parse errors when using arrow functions with an spread element and return type (...props): void => {} (#10) @danez
• Fix leading comments added from previous node (#23) @danez
• Fix parse errors with flow's optional arguments (arg?) => {} (#19) @danez
• Support negative numeric type literals @kittens
• Remove line terminator restriction after await keyword @kittens
• Remove grouped type arrow restriction as it seems flow no longer has it @kittens
• Fix parse error with generic methods that have the name get or set class foo { get() {} } (#55) @vkurchatkin
• Fix parse error with arrow functions that have flow type parameter declarations <T>(x: T): T => x; (#54) @gabelevi

Documentation

• Document AST differences from ESTree (#41) @nene
• Move ast spec from babel/babel (#46) @hzoo

Internal

• Enable skipped tests (#16) @danez
• Add script to test latest version of babylon with babel (#21) @danez
• Upgrade test runner ava @kittens
• Add missing generate-identifier-regex script @kittens
• Rename parser context types @kittens
• Add node v6 to travis testing @hzoo
• Update to Unicode v9 (#45) @mathiasbynens

6.8.1 (2016-06-06)

New Feature

• Parse type parameter declarations with defaults like type Foo<T = string> = T

Bug Fixes

• Type parameter declarations need 1 or more type parameters.
• The existential type * is not a valid type parameter.
• The existential type * is a primary type

Spec Compliancy

• The param list for type parameter declarations now consists of TypeParameter nodes
• New TypeParameter AST Node (replaces using the Identifier node before)

interface TypeParameter <: Node {
  bound: TypeAnnotation;
  default: TypeAnnotation;
  name: string;
  variance: "plus" | "minus";
}

6.8.0 (2016-05-02)

New Feature

Parse Method Parameter Decorators (#12)

Method Parameter Decorators is now a TC39 stage 0 proposal.

Examples:

class Foo {
  constructor(@foo() x, @bar({ a: 123 }) @baz() y) {}
}

export default function func(@foo() x, @bar({ a: 123 }) @baz() y) {}

var obj = {
  method(@foo() x, @bar({ a: 123 }) @baz() y) {}
};

Parse for-await statements (w/ asyncGenerators plugin) (#17)

There is also a new node type, ForAwaitStatement.

Async generators and for-await are now a stage 2 proposal.

Example:

async function f() {
  for await (let x of y);
}