Creating a Node.js function using TypeScript

By default, Node.js does not support TypeScript. Before uploading TypeScript code to Cloud Functions, you need to compile it in JavaScript.

1. Install Node.js.

2. Open your project directory.

3. Install TypeScript:

   npm install typescript --save-dev
   

4. Create a TypeScript configuration:

   npx --no-install tsc --init --preserveConstEnums --moduleResolution Node --isolatedModules --outDir build --strict false --target ES2021
   

   To use a different version of JavaScript, change the value of the target argument. The latest JavaScript version that can be specified depends on the Node.js version you are using:

   Node.js version	Highest JavaScript version
   12	ES2019
   14	ES2020
   16	ES2021

5. Compile a function:

   npx tsc
   

6. The build directory will appear in the project folder. Add its contents to a ZIP archive.

7. Create a function.

8. Create a function version.