TypeScript 6.0 is now available as a bridge release between TypeScript 5.9 and the upcoming native Go-based TypeScript 7.0. Key new features include improved type inference for this-less functions, support for subpath imports starting with #/, combining --moduleResolution bundler with --module commonjs, new --stableTypeOrdering flag for 6.0-to-7.0 migration, es2025 target/lib support, built-in Temporal API types, and Map.getOrInsert/getOrInsertComputed types. The release also introduces significant breaking changes and deprecations to modernize the ecosystem: strict mode is now true by default, module defaults to esnext, types defaults to [], rootDir defaults to the tsconfig directory, and legacy options like --moduleResolution node, --baseUrl, --outFile, AMD/UMD/SystemJS module targets, and target: es5 are deprecated or removed. TypeScript 7.0 (native Go port) is nearly complete and expected within months.
Table of contents
What’s New Since the Beta and RC? Copy linkLess Context-Sensitivity on this -less Functions Copy linkSubpath Imports Starting with #/ Copy linkCombining --moduleResolution bundler with --module commonjs Copy linkThe --stableTypeOrdering Flag Copy linkes2025 option for target and lib Copy linkNew Types for Temporal Copy linkNew Types for “upsert” Methods (a.k.a. getOrInsert ) Copy linkRegExp.escape Copy linkThe dom lib Now Contains dom.iterable and dom.asynciterable Copy linkBreaking Changes and Deprecations in TypeScript 6.0 Copy linkPreparing for TypeScript 7.0 Copy linkWhat’s Next? Copy linkSort: