Modules & TS
.ts
TS implementation file
.tsx
TS implementation file with JSX
.d.ts
TS declaration/definition file
some libraries already include type definition files
most popular libraries have type definition files created
access repo Definitely Typed (for abandonware or untyped libs)
DefinitelyTyped
💀defunct Repo & search engine for 3rd party Type Declaration File - !deprecated since package repos now include type definitions by default
Sources: github.com/DefinitelyTyped/DefinitelyTyped microsoft.github.io/TypeSearch/ www.typescriptlang.org/dt/search