A simple example of a TypeScript library.
cd library
npm install # one time
npm run build # run each time you change the code
Optionally, you can setup a watch on the library so it auto-compiles on change so you don't have to manually recompile every time you change something:
cd library
# either
npm run watch-cjs
# or
npm run watch-es
If you are using VSCode, you can do Terminal > Run Task... > watch all which will start a TypeScript watcher of both ES and CJS builds.
cd test
npm install # one time
npm run test # run each time you want to test, make sure you build the library first or have a watch running!
Alternatively, once you have done npm install in test you can run the tests from library:
cd library
npm run test # you still need to build the library before run, or have a watch running against it!
cd library
npm publish
Publishing will build both cjs and es, then run the tests, then copy the readme into the proper spot, then publish to NPM.