part5.md

Optional: A bit of auto-magic

In this part you will try out utility for automatic generation of Kotlin JavaScript headers from TypeScript definitions files.

Steps:

• Instal ts2kt from npm - npm install -g ts2kt. This utility can be used to automatically convert TypeScript definitions to kotlin bindings. Some libraries have TypeScript definitions bundled in, while many others can be found in the DefinitelyTyped repo.

• Check functions/node_modules/firebase-admin/lib for .d.ts files.

• Try to convert index.d.ts to Kotlin:

ts2kt functions/node_modules/firebase-admin/lib/index.d.ts

• Examine the generated files.

Conclusions:

Auto-generated files are helpful to understand how ts2kt and inter-op works, but unfortunately generated code requires a lot of polishing in most cases.

Links:

• https://github.com/Kotlin/ts2kt
• http://definitelytyped.org/
• https://kotlinlang.org/docs/reference/js-modules.html