Discover some of the interesting features that have landed in stable and beta web browsers during January 2025.

和大部分人使用浏览器书签或者导航类网站索引自己的常用网站不同，我强烈依赖基于浏览器地址栏自动补全来访问我常用的网站。那么，将 A-Z 逐一输入到 Google Chrome 的地址栏里，我的 Google Chrome 都会自动补全出哪些域名呢？

During the last two years, ESM support in TypeScript, Node.js and browsers has made a lot of progress. In this blog post, I explain my modern setup that is relatively simple – compared to what we had to do in the past:

CSS scrollbar-gutter and scrollbar-width have landed in all major browser engines, making it Baseline Newly available.

Ruby on Rails' famous blog in 15 minutes now runs right in your browser thanks to WebAssembly.

In its first edition, this Baseline monthly digest covers happenings in Baseline at both Google and the web developer community in January 2025.

In this blog post, we look at how can make things “read-only” in TypeScript – mainly via the keyword readonly.

随着 Deepseek R1 模型的出现，之前我对大语言模型的诸多论断全都被推翻了。比如先前我在「当患有 ADHD 的工程师坐上了名为人工智能的四驱赛博轮椅」这篇文章提到的开发范式，已经出现了大幅的松动。
原本我在向大语言模型提出开发需求时还需要剪裁自己手里的代码，把问题的核心全都一一挖出来陈列好，交给模型处理。可是现在只需要把所有跟业务逻辑有关的几页代码全都粘在一起，模型就能自己参考有关的实现，完成必要的开发工作。在使用 Rust 这类相对复杂的语言时，模型也能做到基本不出错，出错只需要简单修正一两次，就可以产出高度可用的成果。…

TypeScript’s satisfies operator lets us check the type of a value (mostly) without influencing it. In this blog post, we examine how exactly it works and where it’s useful.

TypeDoc now lets us refer to parts of other files via {@includeCode}. In this blog post, I explain how that works and why it’s useful.

In this blog post, we explore how we can extract parts of compound types via the infer keyword. It helps if you are loosely familiar with conditional types. You can check out chapter “Conditional types” in “Exploring TypeScript” to read up on them.

Interop 2025 continues the mission to make the web more consistent across browsers, building on 2024’s 95% interoperability score.

Today we are excited to announce the Release Candidate (RC) of TypeScript 5.8! To get started using the Release Candidate, you can get it through npm with the following command: npm install -D typescript@rc Let’s take a look at what’s new in TypeScript 5.8!…

A mapped type is a loop over keys that produces an object or tuple type and looks as follows: {[PropKey in PropKeyUnion]: PropValue} In this blog post, we examine how mapped types work and see examples of using them. Their most importing use cases are transforming…

A conditional type in TypeScript is an if-then-else expression: Its result is either one of two branches – which one depends on a condition. That is especially useful in generic types. Conditional types are also an essential tool for working with union types…

In this blog post, we examine how TypeScript handles JavaScript symbols at the type level. If you want to refresh your knowledge of JavaScript symbols, you can check out chapter “Symbols” of “Exploring JavaScript”.

In this blog post, we explore two equivalent notations for Arrays in TypeScript: T[] and Array<T>. I prefer the latter and will explain why.

In this blog post, we look at the special TypeScript type never which, roughly, is the type of things that never happen. As we’ll see, it has a surprising number of applications.