This is a slightly modified Todo MVC sample app using React (initially created by @petehunt):

To run the app:

npm install
npm start

and then open a web browser pointing to http://localhost:9000.

Create a simple pre-commit hook:

cat << EOF >> .git/hooks/pre-commit
npm run jscs
EOF

and make it executable:

chmod +x .git/hooks/pre-commit

Now try to edit a file, e.g. js/util.js, and violate its coding style. When you try to commit your change, Git will complain.

Show the summary of code complexity (using JSComplexity):

npm run complexity

Run the unit tests and track the code coverage:

npm run coverage

and open the file coverage/html/index.html for the coverage report.

For this repository, it is also tracked at codecov.io/github/ariya/from-zero-to-hero.

The unit tests are being executed with the latest Chrome and Firefox using AppVeyor (read more).

The example run is available at ci.appveyor.com/project/ariya/from-zero-to-hero.

The unit tests are being executed with a number of different web browsers using Sauce Labs.

Assuming that the username and access key are stored in the environment variable SAUCE_USERNAME and SAUCE_ACCESS_KEY, Sauce Connect can be initiated as follow (on Linux):

wget -q https://saucelabs.com/downloads/sc-4.3.11-linux.tar.gz
tar -xzf sc-4.3.11-linux.tar.gz
export PATH=$PATH:`pwd`/sc-4.3.11-linux/bin
sc -u $SAUCE_USERNAME -k $SAUCE_ACCESS_KEY -f ~/sc_ready &
sleep 25
while [ ! -e ~/sc_ready ]; do sleep 5; done

and then run the tests with a special Karma configuration:

npm run saucelabs