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Microsoft yesterday announced the release of TypeScript 4.1 Release Candidate (RC). The TypeScript 4.1 release comes with new checking flags, editor productivity updates, speed improvements and more. Find the full list of new improvements below.
- Template Literal Types
- Key Remapping in Mapped Types
- Recursive Conditional Types
--noUncheckedIndexedAccess
paths
 withoutÂbaseUrl
checkJs
 ImpliesÂallowJs
- React 17 JSX Factories
- Editor Support for the JSDocÂ
@see
 Tag - Breaking Changes
You can download TypeScript 4.1 using “npm install typescript@rc” command.
Source: Typescript