- [x] Acorn - https://github.com/acornjs/acorn-private-methods - [x] Babel - https://github.com/babel/proposals/issues/22 - [x] Webstorm - https://youtrack.jetbrains.com/issue/WEB-32673 - [ ] Flow - https://github.com/facebook/flow/issues/6254 - [x] TypeScript - https://github.com/microsoft/TypeScript/pull/42458 - [x] Terser - https://github.com/terser/terser/pull/913 [See all proposals](https://github.com/tc39/proposals/issues/140)
See all proposals