The original headline is: "TypeScript 6.0 Released: Every Breaking Change You Need to Know"

Short summary

TypeScript 6.0 makes strict mode default, removes ES5 support, and changes critical tsconfig.json defaults, potentially breaking builds that passed in 5.9. Use the new --ts6-migration flag to detect breaking patterns before upgrading. Teams must explicitly configure tsconfig.json to preserve 5.x behavior or resolve type errors from stricter checking.

• •Strict mode now defaults to true, enabling 8 compiler flags automatically
• •ES5 support removed; minimum target is now ES2015
• •Use --ts6-migration flag to detect breaking changes before upgrading

Generated with AI, which can make mistakes.