Chart.js doughnut chart

Doughnut chart with the Chart.js adapter

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.min.js"></script>
<script src="https://d26b395fwzu5fz.cloudfront.net/3.4.0/keen.min.js?date=2016-02-17"></script>
<canvas id="chart" height="400" width="400"></canvas>

CSS

canvas#chart {
    display: block;
}

JavaScript

var client = new Keen({
    projectId: "53eab6e12481962467000000",
    readKey: "d1b97982ce67ad4b411af30e53dd75be6cf610213c35f3bd3dd2ef62eaeac14632164890413e2cc2df2e489da88e87430af43628b0c9e0b2870d0a70580d5f5fe8d9ba2a6d56f9448a3b6f62a5e6cdd1be435c227253fbe3fab27beb0d14f91b710d9a6e657ecf47775281abc17ec455"
});

Keen.ready(function(){
    var el = document.getElementById("chart");
    var query = new Keen.Query("count", {
        eventCollection: "user_action",
        groupBy: "offline",
        timeframe: {
  				start: "2013-12-01",
  				end: "2015-02-01"
				}
    });
    client.draw(query, el, {
        library: "chartjs",
        chartType: "doughnut"
    });
});