Keynote
summary
Year-in-review with concrete numbers and features: TypeScript claims ~60M npm downloads per month and ~60% professional adoption, ships on a fixed quarterly cadence, and maintains a <20-person core team while DefinitelyTyped sees ~12k committers and ~250 PRs/week. New runtime and type work includes variadic tuple types, template literal types and recursive conditional types that enable strongly typed concat/split/join, plus tooling like partial semantic mode, call-hierarchy, faster type-checking, catch-clause types, and the noUncheckedIndexedAccess guard; private fields downlevel emit shows measurable perf overhead.
AI-written summary · about
chapters (6)
- 0:00Start
- 18:37Community contributions (thank you!)
- 19:26New ECMAScript features
- 25:26New type system features
- 41:28New tooling features
- 49:30New documentation
