on-release.yml

name: Publish to npm

# Publishes npm package to npmjs registry automatically when creating new release.
# NOTE: You need create a new github repository secret NPM_TOKEN for this to work.
# For further details on how to add secrets, please see github docs https://docs.github.com/en/free-pro-team@latest/actions/reference/encrypted-secrets#creating-encrypted-secrets-for-a-repository

on:
  release:
   types: [published]

jobs:
  build:
   runs-on: ubuntu-latest
   steps:
   - uses: actions/checkout@v2
   - uses: actions/setup-node@v1
     with:
       node-version: 12
       registry-url: https://registry.npmjs.org/
   - name: Publish
     run: npm publish --access public
     env:
       NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}