TypeScript 4.6, Type Syntax in JavaScript

TypeScript Weekly

Issue #185 — March 10, 2022

Announcing TypeScript 4.6

TypeScript 4.6 is out and ships with various quality-of-life improvements to TypeScript. Most notably, this includes control flow analysis for destructured discriminated unions, as well as other improvements.

Daniel Rosenwasser

A Proposal for Type Syntax in JavaScript

The TypeScript team has been working on a new ECMAScript proposal to bring optional and erasable type syntax to JavaScript. The aim of this proposal is to enable developers to run programs written in TypeScript (or other static typing supersets of JavaScript) without any need for transpilation.

Daniel Rosenwasser

A Complete Guide to TypeScript’s never Type

A detailed explanation of the never type: how it works, why it’s needed, some practical applications, and pitfalls to avoid.

Zhenghao He

The TypeScript Converging Point

Stefan walks us through how we can statically type arguments of a Node CLI application in TypeScript, from basic types to sophisticated ones.

Stefan Baumgartner

The Display of Types

Dan dives into the strange world of type display and explores different ways of customizing how a TypeScript type should be presented.

Dan Vanderkam

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TypeScript 4.6 RC, Assertion Functions, Type Hierarchy

Sunday, February 27, 2022

TypeScript Weekly Issue #184 — February 27, 2022 Announcing TypeScript 4.6 RC The release candidate of TypeScript 4.6 is out and ships with various quality-of-life improvements to TypeScript. Most

10 Most Popular Posts from 2021

Wednesday, February 9, 2022

TypeScript Weekly Issue #183 — February 6, 2022 Hi there! 👋 This is the first issue of TypeScript Weekly in 2022. Welcome back if you've been with us last year already, and welcome aboard if you

Function Overloads, Control Flow Analysis, Type | Treat

Friday, December 10, 2021

TypeScript Weekly Issue #182 — December 9, 2021 Get the Best of TypeScript Control Flow Analysis This article will show some simple type construction patterns, code writing habits, and compiler options

TypeScript 4.5, Function Overloading, Const Enums

Thursday, November 25, 2021

TypeScript Weekly Issue #181 — November 25, 2021 Announcing TypeScript 4.5 TypeScript 4.5 has been released! It implements the Awaited type which improves promise typing, introduces a way to override a

How the Compiler Compiles, Mastering Template Literal Types

Friday, November 12, 2021

TypeScript Weekly Issue #180 — November 11, 2021 How the TypeScript Compiler Compiles A systems-level look at the TypeScript compiler: how it converts a file into an intermediate representation, checks

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