Live types in a TypeScript monorepo
EDIT: A previous version of this post recommended publishConfig, operating under the mistaken belief that it could be used to override "exports" during npm publish. As it turns out, npm only uses "publishConfig" to override certain .npmrc fields like registry and tag, whereas pnpm has expanded its use to override package metadata like "main", "types", and "exports". There are a number of reasons y
Branded types for TypeScript - Carlos Menezes
Contents Introduction Issue Solution Introduction Branded types in TypeScript enable the creation of new types by affixing a type tag to an existing underlying type. This tag, commonly referred to as the "brand", distinguishes values of the branded type from others sharing the same underlying type. Acting as a compile-time validator, the brand ensures that values are utilized correctly within thei
Figma’s journey to TypeScript | Figma Blog
May 1, 2024The evolution of Figma’s mobile engine: Compiling away our custom programming language We’ve long written core parts of our mobile rendering architecture in Skew, the custom programming language we invented to squeeze additional performance out of our playback engine. Here’s how we automatically migrated Skew to TypeScript without disrupting a single day of development. Skew began as a
Effective TypeScript › Flow Nodes: How Type Inference Is Implemented
In most programming languages a variable has a type and that type does not change. But one of the most interesting aspects of TypeScript's type system is that a symbol has a type at a location. Various control flow constructs can change this type: function refine(x: string | number) { // type of x is string | number here if (typeof x === 'number') { // type of x is number here. } else { // type of
Build a Node App with TypeScript
Matt PocockMatt is a well-regarded TypeScript expert known for his ability to demystify complex TypeScript concepts. In this article, we'll learn how to set up TypeScript to bundle a Node app. We'll be using: pnpm for package management. Node.js for running our code. TypeScript for type safety and for bundling our code. ES Modules as our module system. If you're interested in a setup involving ESB
Type Predicate Inference: The TS 5.5 Feature No One Expected
Matt PocockMatt is a well-regarded TypeScript expert known for his ability to demystify complex TypeScript concepts. TypeScript 5.5 will be dropping in the next couple of months. And thanks to one PR in particular, I already know it's going to be an incredible release. On Friday night, TypeScript merged Dan Vanderkam's PR to "Infer type predicates from function bodies using control flow analysis".
Modern JavaScript library starter
(Read this article on the blog)Publishing a library Back then when I wanted to write and publish a JavaScript library, all I had to do is to create a new GitHub project, write a package.json with some basic details, add an index.js, and publish to NPM via the CLI. But this simple setup misses a lot of new things that are considered essentials: no types, no CI/CD, no tests, to name a few. So the la
dprint - Code Formatter
dprint A pluggable and configurable code formatting platform written in Rust. Formatting is very fast. Plugins are WebAssembly files that may be imported from a URL or file path. Official plugins are highly configurable enabling you to auto format code closer to your preferences. Configuration may be imported from URLs for reuse and sharing.
Introducing TypeChat - TypeChat
July 20, 2023 by Anders Hejlsberg, Steve Lucco, Daniel Rosenwasser, Pierce Boggan, Umesh Madan, Mike Hopcroft, and Gayathri Chandrasekaran In the last few months, we've seen a rush of excitement around the newest wave of large language models. While chat assistants have been the most direct application, there's a big question around how to best integrate these models into existing app interfaces.
OSSのWebフレームワークが突如TypeScriptからJavaScriptに移行して紛糾 | スラド オープンソース
「Turbo 8」というOSSのWebフレームワークが、「Remove TypeScript」というプルリクで突然にTypeScriptからJavaScriptへの移行を行ったことで、OSS界隈で大きな話題となっているらしい。一般にTypeScriptは型のあるベターなJavaScriptとして扱われるが、移行理由として厳しい型付けやコンパイルの要否などが挙げられている。ただしプルリク提出から2時間で議論する間も無くマージされたので、相当のツッコミも入っているようだ（Turbo 8 is dropping TypeScript、GitHub Remove TypeScript by afcapel、DEVCLASS、はてなブックマーク）。
Visual Studio Code blog
Version 1.88 is now available! Read about the new features and fixes from March. July 20, 2023 by Matt Bierner, @mattbierner We recently reduced the size of Visual Studio Code's shipped JavaScript by 20%. That works out to a little over 3.9 MB saved. Sure that's less than some of the individual gifs from our release notes, but that's still nothing to sniff at! Not only does this reduction mean les
TypeScript 5.2's New Keyword: 'using'
Matt PocockMatt is a well-regarded TypeScript expert known for his ability to demystify complex TypeScript concepts. TypeScript 5.2 introduces a new keyword - using - that you can use to dispose of anything with a Symbol.dispose function when it leaves scope. { const getResource = () => { return { [Symbol.dispose]: () => { console.log('Hooray!') } } } using resource = getResource(); } // 'Hooray!'
wasmati: You should write your WebAssembly in TypeScript - ZKSECURITY
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入れ子構造を自由に拡張する – TypeScript版「Trees that Grow」 | IIJ Engineers Blog
日本Haskellユーザーグループ（愛称 Haskell-jp）発起人の一人にして、Haskell-jpで一番のおしゃべり。 HaskellとWebAssemblyとプリキュアとポムポムプリンをこよなく愛する。 This is a Japanese translation of Flexiblly Extend Nested Structures – “Trees that Grow” in TypeScript. 抽象構文木（AST, Abstract Syntax Tree）の扱いに慣れた一部のHaskell開発者の間では、「Trees that Grow」というイディオムが一般的で、Haskellの最も有名なコンパイラ、GHCにおいても採用されています。今回は、この「Trees that Grow」をTypeScriptで実現するにはどうすれば良いかを共有しましょう。 あらまし Ha
TypeScript's Migration to Modules - TypeScript
One of the most impactful things we’ve worked on in TypeScript 5.0 isn’t a feature, a bug fix, or a data structure optimization. Instead, it’s an infrastructure change. In TypeScript 5.0, we restructured our entire codebase to use ECMAScript modules, and switched to a newer emit target. What to Know Now, before we dive in, we want to set expectations. It’s good to know what this does and doesn’t m
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What the heck is a homomorphic mapped type?
GitHub - arktypeio/arktype: TypeScript's 1:1 validator, optimized from editor to runtime
TypeScript's Hidden Feature: Subtypes
A preview of Ezno's checker
GitHub - gvergnaud/hotscript: A library of composable functions for the type-level! Transform your TypeScript types in any way you want using functions you already know.
