... But appears not to have rolled out for most people (presumably the old setup stuck until the render cache clears).<p>By way of explanation:<p><pre><code> <canvas data-color-all="#e0e0e0" data-color-owner="#4183C4"
data-source="/ab9/simple_authentication_starter/graphs/owner_participation">
</canvas>
</code></pre>
Each timeline is drawn in a <canvas> element. Each element uses the data-src to grab a JSON blob with "all" and "owner" keys, and uses the <i>color-owner</i> and <i>color-all</i> attributes to figure out which colours to use when drawing them. Kinda neat.<p>Not a peep from GitHub about this officially, unfortunately, regarding both it going away or coming back.