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TypeScript 4.0, Template String & Recursive Conditional Types

TypeScript Weekly

Issue #149 — September 2, 2020

Announcing TypeScript 4.0

TypeScript 4.0 has been released and brings some exciting new features, including variadic tuple types, labeled tuple elements, the new assignment operators &&=, ||=, and ??=, and more. Although it is a major release, there are no major breaking changes.

Daniel Rosenwasser

this in JavaScript and TypeScript

This post explains how the this keyword works in JavaScript and how TypeScript can help you understand what this refers to.

Stefan Baumgartner

Template String Types and Mapped Type `as` Clauses

Anders Hejlsberg has been working on interesting new type system capabilities: template string types as well as mapped type as clauses. Both features are slated for the upcoming TypeScript 4.1 release.

Anders Hejlsberg

Recursive Conditional Types

Another pull request by Anders Hejlsberg that adds support for recursive conditional types to TypeScript. Up until now, conditional types were restricted to be non-recursive.

Anders Hejlsberg

TypeScript Support in Svelte

How to use TypeScript in Svelte applications: all the way from configuring the project to migrating it from JavaScript to TypeScript.

MDN

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Marius Schulz, 42 Shoreline Building, 42 Newnton Close, London N4 2GT

Older messages

TypeScript Exercises, Types as Axioms

Wednesday, August 19, 2020

TypeScript Weekly Issue #148 — August 19, 2020 airbnb/ts-migrate A tool for helping migrate code to TypeScript. It takes a JavaScript (or partial TypeScript) project and outputs a compiling TypeScript

Nullish Coalescing Operator, New TypeScript Website

Thursday, August 6, 2020

TypeScript Weekly Issue #146 — August 6, 2020 Nullish Coalescing: The ?? Operator in TypeScript TypeScript 3.7 added support fort the ?? operator, also known as the nullish coalescing operator. We can

TypeScript + React, TypeScript + Svelte

Wednesday, July 29, 2020

TypeScript Weekly Issue #145 — July 29, 2020 TypeScript + React: Component Patterns A collection of component patterns for React when working with TypeScript. Stefan Baumgartner TypeScript: Data

TypeScript Support in Svelte, Thinking in Types

Wednesday, July 22, 2020

TypeScript Weekly Issue #144 — July 23, 2020 Advanced TypeScript An index of TypeScript posts that Stefan Baumgartner has written on his blog, covering various topics like control flow, generics, and

Variadic Tuple Types, Computing with Types

Monday, July 6, 2020

TypeScript Weekly Issue #143 — July 6, 2020 What's coming in TypeScript 4? An overview of upcoming features in TypeScript 4.0 with a handful of examples: variadic tuple types, labeled tuple types,

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