callback-this-type

Provide a Type for this in Callbacks if It's Part of Their API

When a library calls a user-provided callback with a specific this context, that context is part of the API. TypeScript allows you to type this as the first parameter of a function, even though it's not a real parameter. This documents and enforces the expected context.

Type this as the first parameter when it's part of your callback API. This documents the expected context and enables autocompletion.

當回調使用它時使用。當 API 提供此上下文時使用。鍵入事件處理程序時使用。當庫在回調中設定此項目時使用。在記錄回調上下文時使用。 來源：marius-townhouse/effective-typescript-skills。