How to Write and Use TypeScript Declaration File

TypeScript, developed by Microsoft, is a superset of JavaScript. It features static typing, class, and interface. Comparing to JavaScript, One of my favorite TypeScript features is that we can create a TypeScript declaration file (.d.ts) for IntelliSense in Visual Studio Code or other supported IDEs. In this article, I will share how to write a definition file for JavaScript APIs of Dynamic Web TWAIN SDK, as well as how to implement a web document scanning app using TypeScript.

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