Links to "Tooling implementation status" issues for some proposals, so people can see whether their tools support the proposals. I check them when they are supported in WebStorm, Babel and Flow.

• Tooling implementation status proposal-class-fields#57
• Tooling implementation status proposal-private-methods#32
• Tooling implementation status proposal-optional-chaining#44
• Tooling implementation status proposal-nullish-coalescing#29
• Tooling implementation status proposal-pipeline-operator#123
• Tooling implementation status proposal-pattern-matching#107
• Tooling implementation status proposal-throw-expressions#11

By tool

• Babel - https://github.com/babel/proposals
• WebStorm - https://youtrack.jetbrains.com/issues/WEB?q=tag:%20ESNext
• Flow - TC39 proposals status facebook/flow#6258
• VSCode
• Typescript
• Sublime - [JavaScript] ECMAScript Omnibus sublimehq/Packages#1269