Timer webapp

This simple timer application for the web was made to experiment with some web APIs:

• Web Components to structure an application.
• manifest and service worker to make a web application available offline.
• Web Audio API to generate sound.
• Screen Wake Lock API to keep device from entering sleep mode when running a workout timer.

Known issues

Screen Wake Lock and Web audio API do not work properly in iOS Safari, making the workout timer pretty useless on iPhones.