This document outlines our focused tasks for TypeScript 4.3, as well as some of the discussion that explains how/why we prioritized certain work items. Nothing is set in stone, but we will strive to complete them in a reasonable timeframe.

Language Features

• Generalized index signatures
• Improve support for well-known symbols
• --noImplicitOverride
• ES #private methods
• static index signatures
• Package export maps
• Review the project setup experience
• Investigate different types and visibility modifiers for get/set accessors
• Investigate strictness flag for unknown in catch
• Migrate to modules
• Investigate improved error display
• Investigate faster compile-time iteration

Editor Productivity

• Continue enabling the Language Server Protocol (LSP)
• Investigate auto-import improvements
  • Sorted auto-imports in completions
  • Display result paths in completions
  • Complete import statements through auto-imports
• Improve JSDoc @see and @link support
• Investigate inline hints
• Investigate high-confidence "did you mean?" in JS
• Continue improving TSServer in a worker thread
• Continue improving partial semantic mode
• Investigate improved error UI

Performance

• Profiling/Tracing Mode Improvements

Infrastructure

• Better baseline reports for bot testing
• Perf Regression Tracking
  • Committing Scripts to Repo
  • Integrate into Release Activities
• Perf Suite Reliability

Website

• Continue smoothing out first user experience
• Create project setup documentation
• Fix display issues on sample error spans
• Switch to new handbook

DefinitelyTyped

• Continue improving processes and performance