function(instance, properties, context) { var ctx = document.getElementById('myChart');
var data = context.endpoint || []
var myChart = new Chart(ctx, {
labels: data.map(s=>s.date),
label: '# of ' + context.title,
data: data.map(s=>parseInt(s.value)),
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
'rgba(153, 102, 255, 1)',