TypeScript 4.3 RC, Sources of Unsoundness

TypeScript Weekly

Issue #170 — May 13, 2021

Announcing TypeScript 4.3 RC

The release candidate of TypeScript 4.3 is out and brings support for separate write types on properties, the override keyword, template string type improvements, and more.

Daniel Rosenwasser

TypeScript Function Syntaxes

An overview of the various syntaxes for function types in TypeScript, along with simple examples.

Kent C. Dodds

The Seven Sources of Unsoundness in TypeScript

An overview of various TypeScript patterns that can lead to unsound code where the static type of a symbol is not necessarily compatible with its runtime values.

Dan Vanderkam

TypeScript Enums I Want to Actually Use

An opinionated take on (constant) enums in TypeScript.

Robin Pokorny

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Advanced TypeScript Fundamentals, Converting a Frontend to TypeScript

Thursday, April 29, 2021

TypeScript Weekly Issue #169 — April 29, 2021 Hi there! I'm super stoked to announce my new TypeScript course: 7209f980-de4c-462d-bafe-de356617a78e.png Advanced TypeScript Fundamentals Learn the

TypeScript's Popularity, Migrating DevTools to TypeScript

Thursday, April 22, 2021

TypeScript Weekly Issue #168 — April 22, 2021 Type-Checking JavaScript with the TypeScript Team A 1h15m chat with the TypeScript team about type-checking JavaScript code. Jean Yang Migrating DevTools

TypeScript 4.3 Beta, Project References, TypeScript Notes

Tuesday, April 6, 2021

TypeScript Weekly Issue #167 — April 6, 2021 Announcing TypeScript 4.3 Beta The beta release of TypeScript 4.3 is out and brings support for the override keyword, truly private class methods and

New TypeScript Handbook, Immutability in TypeScript

Tuesday, March 23, 2021

TypeScript Weekly Issue #166 — March 23, 2021 Announcing the New TypeScript Handbook The TypeScript team has released a fresh re-write of the TypeScript Handbook, ramping up the scale, modernity, and

TypeScript 4.2, Narrow Types in catch Clauses

Thursday, March 4, 2021

TypeScript Weekly Issue #165 — March 4, 2021 Announcing TypeScript 4.2 TypeScript 4.2 is out and introduces smarter type alias preservation, leading/middle rest elements in tuple types, and more.

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