What's Changed

• Implement deterministic collapse of await in await using by Ron Buckton (@rbuckton) in #262
• Use global 'Iterator.prototype' for downlevel generators by Ron Buckton (@rbuckton) in #267

Full Changelog: v2.6.3...v2.7.0

What's Changed

• 'await using' normative changes by Ron Buckton (@rbuckton) in #258

Full Changelog: v2.6.2...v2.6.3

What's Changed

• Fix path to exports["module"]["types"] by Andrew Branch (@andrewbranch) in #217

Full Changelog: v2.6.1...v2.6.2

What's Changed

• Allow functions as values in __addDisposableResource by Ron Buckton (@rbuckton) in #215
• Stop using es6 syntax in the es6 file by Andrew Branch (@andrewbranch) in #216

Full Changelog: 2.6.0...v2.6.1

What's Changed

• Add helpers for using and await using by Ron Buckton (@rbuckton) in #213

Full Changelog: v2.5.3...2.6.0

What's Changed

• Do not reference tslib.es6.js from package.json exports by Andrew Branch (@andrewbranch) in #208

Full Changelog: 2.5.2...v2.5.3

This release explicitly re-exports helpers to work around TypeScript's incomplete symbol resolution for tslib.

This release of tslib provides fixes for two issues.

First, it reverses the order of init hooks provided by decorators to correctly reflect proposed behavior.

Second, it corrects the exports field of tslib's package.json and provides accurate declaration files so that it may be consumed under the node16 and bundler settings for moduleResolution.

What's New

• Fix asyncDelegator reporting done too early by @apendua in https://github.com/microsoft/tslib/pull/187
• Add support for TypeScript 5.0's __esDecorate and related helpers by @rbuckton in https://github.com/microsoft/tslib/pull/193

Full Changelog: https://github.com/microsoft/tslib/compare/2.4.1...2.5.0

This release contains fixes for early returns and throws invoked on generators.

This release includes the __classPrivateFieldIn helper as well as an update to __createBinding to reduce indirection between multiple re-exports.

This release updates the __spreadArray helper for TypeScript 4.4 to correctly operate on collections that are not "concat-spreadable" such as the DOM's NodeLists and HTMLCollections.

This release updates tslib to use TypeScript 4.4's upcoming __spreadArray helper which correctly preserves sparse array inputs (e.g. arrays containing "missing" elements like [1, 2, , 4]). This new version of __spreadArray is backwards-compatible and is often also faster. See https://github.com/microsoft/tslib/pull/151 for more details.

This release supports TypeScript 4.3's new functionality for ECMAScript private methods and accessors, and private static class members.

It does so by expanding the scope of __classPrivateFieldGet and __classPrivateFieldSet. See https://github.com/microsoft/tslib/pull/146 for more details.

This release adds a new __spreadArray helper which avoids side-effects compared to the now-deprecated __spreadArrays and __spread helpers. See https://github.com/microsoft/tslib/pull/133 for more details.

This release also provides a more-specific error message when extending from a type which is not a function and not null. See https://github.com/microsoft/tslib/pull/138 for more details.

Full discussion in the webpack issue

This release adds support for using tslib in Node using esmodule imports, further context in #126 and the related issues.

1. Use Object.prototype.hasOwnProperty.call.
2. Skip default when iterating exports in __importStar.
3. Shorter parameter name in __exportStar.

This release changes __exportStar and __importStar to use __createBinding which is incompatible with versions of TypeScript older than 3.9 (i.e. 3.8 and below).

Long discussion in the webpack issues

This release adds support for using tslib in Node using esmodule imports, further context in https://github.com/microsoft/tslib/pull/126 and the related issues.

This release reverts breaking changes in tslib that were not compatible with versions of TypeScript prior to 3.9. The behavior slightly diverges from that of TypeScript 3.9, but generally is compatible with previous versions of TypeScript-authored code.

The new behavior of TypeScript 3.9 will be available in tslib 2.0.0.

See this pull request for more details.

This release adds the __createBinding helper function which is used by non-ECMAScript module emit in TypeScript 3.9.

This release relicenses tslib to the 0BSD license which should allow projects that embed or bundle tslib to omit its license header.

This release updates tslib's declaration files so that users don't have to include declarations for WeakMap in their compilation.

This release provides the __classPrivateFieldGet and __classPrivateFieldSet helper functions to power ECMAScript private fields in TypeScript 3.8.

This release fixes enumerability in object rest's __rest helper (see details here) and adds a new __spreadArrays helper (done as part of a change for more accurate array spreads).

This release changes the __extends and __assign helper functions so that certain tools may more easily analyze them. Details are available on https://github.com/Microsoft/TypeScript/pull/24244.

Fixes issues in the __generator helper regarding return-ing and throw-ing. Details are available on https://github.com/Microsoft/TypeScript/pull/24463

Updates __asyncValues to more correctly align with CreateAsyncFromSyncIterator, and updates __asyncDelegator to ensure throw is correctly propagated.

This release introduces import helpers that are utilized by TypeScript 2.7's --esModuleInterop flag for interoperability between ECMAScript modules and legacy module formats.

This release includes a fix that prevents tslib from emitting an __esModule member on the global object.

This release includes

• the new __makeTemplateObject helper used in TypeScript 2.6
• a fix for using the __awaiter helper in older browsers

This release contains a fix relating how exceptions are propagated in async contexts.

This release contains the following changes:

• Update to the latest helpers for async generators.

NOTE: This is a breaking change from TypeScript 2.3.2 and earlier when using tslib with async generators:

• If you are using TypeScript 2.3.2 or earlier and are writing async generators, you must use tslib version 1.6.1.
• If you are using TypeScript 2.3.3 or later and are writing async generators, you must use tslib version 1.7.0 or later.

• Fixes an issue with async yield* delegation.

• Adds helpers to support async generators

• Updated the __extends helper to use Object.setPrototypeOf or __proto__ for extending statics when the runtime supports it.

Changes:

• Fix JSPM load issue (see https://github.com/Microsoft/TypeScript/issues/12887)

Changes:

• Add bower support
• Fix IE8 compat in Function.apply calls in __awaiter

Changes:

• Handel for null and undefined in __rest
• Add __generator helper to es6 source and populate jsnext:main

Changes:

• Add __rest helper
• Add __generator helper
• Fix syntax error in __awaiter when running in ES3