tslib

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.

Initial Release.

Changes:

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

Changes:

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