Release v7.0.0-alpha.17 · babel/babel

v7.0.0-alpha.17 (2017-07-26)

Lots of bug fixes
function.sent (temporary at babel-plugin-transform-function-sent2 until we get access to the npm package) EDIT: republished babel-plugin-transform-function-sent
Optional catch binding try {} catch {}: babel-plugin-transform-optional-catch-binding
es2015-parameters loose mode that doesn't use arguments

babel-plugin-check-es2015-constants
- #5930 Spec compliancy of check-es2015-constants plugin. (@maurobringolf)

Instead of throwing a compile time error when const is violated, Babel should insert a throw statement before the violation.

Removes the "Noop" AST node, which was only used in the flow-comments plugin and probably unlikely in the ecosystem.

babel-plugin-transform-react-constant-elements
- #5307 feature: Support whitelisting mutable props for react-constant-elements. (@STRML)

If you know a certain property will be ok to hoist

{
  "plugins": [
    ["transform-react-constant-elements", {"allowMutablePropsOnTags": ["FormattedMessage"]}],
  ]
}

babel-generator, babel-types
- #5856 babel-types: Add TypeScript definitions. (@andy-ms)
babel-generator, babel-plugin-transform-flow-strip-types, babel-types
- #5984 Add support for flow predicates in babel-generator. (@existentialism)

declare function foo(x: mixed): boolean %checks(x !== null);

babel-generator, babel-plugin-transform-flow-strip-types
- #5985 Add support for export type star in babel-generator. (@existentialism)

declare module "foo" { declare export type * from "bar"; }

babel-helper-remap-async-to-generator, babel-helper-wrap-function, babel-helpers, babel-plugin-transform-function-sent, babel-preset-stage-2
- #5920 Function sent. (@nicolo-ribaudo)

function* gen() {
  let a = function.sent;
}

let gen = _skipFirstGeneratorNext(function* gen() {
  const _functionSent = yield;
  let a = _functionSentt;
})

babel-core, babel-generator, babel-plugin-syntax-optional-catch-binding, babel-plugin-transform-optional-catch-binding, babel-template, babel-traverse, babel-types
- #5956 Add optionality to catch bindings. (@MarckK)

try {} catch {}

babel-plugin-transform-es2015-parameters
- #5943 2nd try: Add loose option for es2015-parameters transformation. (@maurobringolf)

Non-spec compliant transform (disregards arity) but doesn't use arguments

var t = function (f = "foo") {
  return f + " bar";
};

var t = function (f) {
  if (f === void 0) {
    f = "foo";
  }

  return f + " bar";
};

babel-core, babel-helpers, babel-plugin-transform-object-rest-spread, babel-plugin-transform-react-constant-elements
- #5757 Non string computed keys in object-rest-spread. (@peey)
babel-traverse
- #5745 Use first binding for multiple var declarations. (@peey)
babel-helper-builder-binary-assignment-operator-visitor, babel-helper-explode-assignable-expression, babel-plugin-transform-exponentiation-operator
- #5969 Fixup builder-binary-assignment-operator-visitor. (@jridgewell)
babel-plugin-transform-es2015-for-of, babel-traverse
- #5835 Fix a few type inferences. (@jridgewell)
babel-plugin-transform-numeric-separator, babel-types
- #5968 Fix numeric-separator transform. (@jridgewell)
babel-plugin-transform-es2015-modules-amd, babel-plugin-transform-es2015-modules-commonjs, babel-plugin-transform-es2015-modules-umd
- #5953 Support exporting deep destructuring. (@jridgewell)
babel-plugin-transform-es2015-for-of
- #5964 Fix for-of loose optimization. (@jridgewell)
babel-core, babel-plugin-transform-object-rest-spread, babel-traverse
- #5945 Remove maybePopFromStatements. (@jridgewell)
babel-generator
- #5950 [generator] remove parens from break & continue. (@sarupbanskota)
babel-helpers, babel-plugin-transform-es2015-classes, babel-plugin-transform-es2015-typeof-symbol
- #5955 Optimize and remove state from typeof-symbol transform. (@jridgewell)
babel-plugin-transform-react-inline-elements
- #5958 Fix react-inline-elements bug. (@jridgewell)

babel-helper-transform-fixture-test-runner
- #6002 Update chai to 4.x. (@danez)
babel-code-frame
- #6003 Update chalk to 2.x. (@danez)
babel-register
- #5999 Update find-cache-dir to 1.0. (@danez)
- #6000 Update default-require-extensions to 2.0. (@danez)
babel-types
- #5997 Update to-fast-properties to 2.0. (@danez)
babel-cli
- #5996 Update output-file-sync to 2.0. (@danez)
- #5975 Update v8flags to version 3.0.0. (@Siilwyn)
babel-generator
- #5995 Update jsesc to the latest version. (@danez)
babel-traverse
- #5993 Update globals to v10. (@danez)
Other
- #5991 Fix clean to remove package-lock files. (@danez)
- #5959 Bump istanbul and nyc. (@existentialism)
babel-core, babel-generator, babel-helper-builder-react-jsx, babel-helper-function-name, babel-helper-replace-supers, babel-plugin-transform-es2015-block-scoping, babel-plugin-transform-es2015-classes, babel-plugin-transform-jscript, babel-plugin-transform-react-constant-elements, babel-plugin-transform-react-jsx, babel-template, babel-traverse, babel-types
- #5963 Stop mutating nodes. (@jridgewell)
babel-plugin-transform-es2015-modules-systemjs
- #5954 Add several test cases for systemjs exports. (@jridgewell)