Learn fundamental JavaScript via a three-part blog post series by @zellwk.

git clone https://github.com/tkraak/calculator-seed.git calculatorcd calculatornpm install or yarn installhttp://localhost:8080:
npm startnpm run buildnpm testcalculator on GitHubgit remote set-url origin https://github.com/USERNAME/calculator.git (ensure that USERNAME matches your GitHub username)git push -u origin masterupstream):
git remote add upstream https://github.com/tkraak/calculator-seed.gitgit pull upstream master --rebase