雰囲気でパッケージマネージャーを作ろう
概要 本記事では、 npm や yarn などの、Node.js におけるパッケージマネージャーを自作することで、その仕組みや挙動の理解を深めようという取り組みを整理した記事になります。 想定読者は以下を満たす人です。 普段 npm や yarn などのパッケージマネージャを使用している package.json 内の dependencies devDependencies ぐらいはわかる npm リポジトリの構成や、パッケージインストールの仕組みとか全然わからんけど、興味がないこともない TypeScript のコードをまぁまぁ読み書きできる 筆者自身も上記のレベルのため、パッケージマネージャに詳しい方が見たら鼻で笑うレベルの内容でもあるので、どうぞお手柔らかにお願いします。 注意事項 本記事ではソースコードを断片的に記載していますが、ハンズオン形式にはなっていないため、コードの全容に
Implementing Promisable setTimeout - Dmitry Kudryavtsev
In a world controlled by the event loop, setTimeout is the king of execution control. It allows you to schedule function calls to be executed later. However, it can’t do one thing - suspend the execution for a certain amount of time. Think of an equivalent to sleep(ms) from different languages. Let us now explore how we can implement it. Promisifying setTimeout In order to make setTimeout behave s
Lusift | Build Product Guides/tours
Javascript product tour libraryJavascript library to create product walkthroughs for your web app. Drive users through different features in your product.
Things not available when someone blocks all cookies
l'occasion f — Gelegenheit f, die ~ , der ~. bei Gelegenheit — à l'occasionI #StandWithUkraine 🇺🇦. The other day, I received a harmless-looking Issue for my app SVGcode (announcement blog post). The Issue read: Crash when opened with cookies blocked Hey I block cookies by default. Unfortunately your website doesn’t handle that nicely despite it not needing (IMO) cookies to operate. I'm getting t
Package exports | webpack
The exports field in the package.json of a package allows to declare which module should be used when using module requests like import "package" or import "package/sub/path". It replaces the default implementation that returns main field resp. index.js files for "package" and the file system lookup for "package/sub/path". When the exports field is specified, only these module requests are availab
Jest 29: Snapshot format changes · Jest
Jest 29 is here, just a few short months after Jest 28. As mentioned in the Jest 28 blog post, this version contains just a couple of breaking changes, in order to make the upgrade as smooth as possible. The only breaking changes that should be noticeable are: Node versions 12 and 17 are dropped, both of which are EOL The snapshotFormat property is changed to: + snapshotFormat: { + escapeString: f
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