Dave Moshers js30 challenges

Challenge Specific Notes

01 - JavaScript Drum Kit

• learning that HTMLMediaElement.play() returns a promise was cool
• i wanted to limit the scope of keydown events so I added a list of valid codes to filter on when the event was fired

02 - JS and CSS Clock

• i decided to default the position in the markup and build a little parser to snag the current state of rotation
• this felt easier than tracking that state in a js variable
• named regex capture groups make this pretty easy
• concern: given i never reset the value on the rotation deg things might buffer overflow eventually?
• not yet implemented: binding to the actual current time
• bug: setInterval independently means a slight offset in latency for all the hands