Using images as labels

const config = { type: 'line', data, options: { scales: { y: { beginAtZero: true } }, plugins: { annotation: { annotations: { annotation } } } } };

const config = {
  type: 'line',
  data,
  options: {
    scales: {
      y: {
        beginAtZero: true
      }
    },
    plugins: {
      annotation: {
        annotations: {
          annotation
        }
      }
    }
  }
};

const annotation = { type: 'ellipse', backgroundColor: 'rgba(0, 0, 0, 0.2)', borderWidth: 1, borderColor: '#F27173', yMin: 30, yMax: 80, xMax: 2, xMin: 5, label: { display: true, content: Utils.getImage(), width: 150, height: 150, position: 'center' } };

const annotation = {
  type: 'ellipse',
  backgroundColor: 'rgba(0, 0, 0, 0.2)',
  borderWidth: 1,
  borderColor: '#F27173',
  yMin: 30,
  yMax: 80,
  xMax: 2,
  xMin: 5,
  label: {
    display: true,
    content: Utils.getImage(),
    width: 150,
    height: 150,
    position: 'center'
  }
};

const DATA_COUNT = 12; const MIN = 10; const MAX = 100; const numberCfg = {count: DATA_COUNT, min: MIN, max: MAX}; const data = { labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'], datasets: [{ data: Utils.numbers(numberCfg) }] };

const DATA_COUNT = 12;
const MIN = 10;
const MAX = 100;
const numberCfg = {count: DATA_COUNT, min: MIN, max: MAX};
const data = {
  labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
  datasets: [{
    data: Utils.numbers(numberCfg)
  }]
};