matrix-jobs

version: 2.1

orbs:
  node: circleci/node@4.0.0
  win: circleci/windows@2.2.0

executors:
  linux: # linux executor using the node base image
    docker:
      - image: cimg/node
        auth:
          username: mydockerhub-user
          password: $DOCKERHUB_PASSWORD  # context / project UI env-var reference
  windows: win/default # windows executor - uses the default executor from the windows orb
  macos: # macos executor using xcode 11.6
    macos:
      xcode: 11.6

jobs:
  test:
    parameters:
      os:
        type: executor
      node-version:
        type: string
    executor: << parameters.os >>
    steps:
      - checkout
      - node/install:
          node-version: << parameters.node-version >>
          install-yarn: true
      - run: yarn test

workflows:
  all-tests:
    jobs:
      - test:
          matrix:
            parameters:
              os: [linux, windows, macos]
              node-version: ["13.13.0", "14.0.0"]
The expanded version of this matrix runs the following list of jobs under the all-tests workflow:

    - test-13.13.0-linux
    - test-14.0.0-linux
    - test-13.13.0-windows
    - test-14.0.0-windows
    - test-13.13.0-macos
    - test-14.0.0-macos