Mappy

The Chrome extension development example Mappy, updated.

Original: https://developer.chrome.com/extensions/samples#search:mappy

To use:

Clone the repo
Open chrome://extensions
Swtich developer mode on.
Click on 'Load Unpacked'
In 'Browse For Folder', navigate to Mappy/mappy
If you make changes, be sure to hit refresh for the extension on the chrome://extensions page.