Interaction

const config = { type: 'line', data, options: { scales: { y: { beginAtZero: true, min: 0, max: 100 } }, plugins: { title: { display: true, text: getTitle, position: 'bottom', font: { size: 14 } }, annotation: { annotations: { annotation1, annotation2 } } } } };

const config = {
  type: 'line',
  data,
  options: {
    scales: {
      y: {
        beginAtZero: true,
        min: 0,
        max: 100
      }
    },
    plugins: {
      title: {
        display: true,
        text: getTitle,
        position: 'bottom',
        font: {
          size: 14
        }
      },
      annotation: {
        annotations: {
          annotation1,
          annotation2
        }
      }
    }
  }
};

const annotation1 = { type: 'box', backgroundColor: 'rgba(255, 245, 157, 0.2)', borderColor: 'rgb(255, 245, 157)', borderWidth: 2, enter: function({element}) { console.log(element.label.options.content + ' entered'); element.label.options.font.size = 14; return true; }, click: function({element}) { console.log(element.label.options.content + ' clicked'); }, leave: function({element}) { console.log(element.label.options.content + ' left'); element.label.options.font.size = 12; return true; }, label: { display: true, content: 'Outer box annotation', position: { y: 'start' }, font: { size: 12 } }, xMax: 'June', xMin: 'February', xScaleID: 'x', yMax: 90, yMin: 10, yScaleID: 'y' };

const annotation1 = {
  type: 'box',
  backgroundColor: 'rgba(255, 245, 157, 0.2)',
  borderColor: 'rgb(255, 245, 157)',
  borderWidth: 2,
  enter: function({element}) {
    console.log(element.label.options.content + ' entered');
    element.label.options.font.size = 14;
    return true;
  },
  click: function({element}) {
    console.log(element.label.options.content + ' clicked');
  },
  leave: function({element}) {
    console.log(element.label.options.content + ' left');
    element.label.options.font.size = 12;
    return true;
  },
  label: {
    display: true,
    content: 'Outer box annotation',
    position: {
      y: 'start'
    },
    font: {
      size: 12
    }
  },
  xMax: 'June',
  xMin: 'February',
  xScaleID: 'x',
  yMax: 90,
  yMin: 10,
  yScaleID: 'y'
};

const annotation2 = { type: 'box', backgroundColor: 'rgba(165, 214, 167, 0.2)', borderColor: 'rgb(165, 214, 167)', borderWidth: 2, enter: function({element}) { console.log(element.label.options.content + ' entered'); element.label.options.font.size = 14; return true; }, click: function({element}) { console.log(element.label.options.content + ' clicked'); }, leave: function({element}) { console.log(element.label.options.content + ' left'); element.label.options.font.size = 12; return true; }, label: { display: true, content: 'Inner box annotation', position: { y: 'start' }, font: { size: 12 } }, xMax: 'May', xMin: 'March', xScaleID: 'x', yMax: 75, yMin: 25, yScaleID: 'y' };

const annotation2 = {
  type: 'box',
  backgroundColor: 'rgba(165, 214, 167, 0.2)',
  borderColor: 'rgb(165, 214, 167)',
  borderWidth: 2,
  enter: function({element}) {
    console.log(element.label.options.content + ' entered');
    element.label.options.font.size = 14;
    return true;
  },
  click: function({element}) {
    console.log(element.label.options.content + ' clicked');
  },
  leave: function({element}) {
    console.log(element.label.options.content + ' left');
    element.label.options.font.size = 12;
    return true;
  },
  label: {
    display: true,
    content: 'Inner box annotation',
    position: {
      y: 'start'
    },
    font: {
      size: 12
    }
  },
  xMax: 'May',
  xMin: 'March',
  xScaleID: 'x',
  yMax: 75,
  yMin: 25,
  yScaleID: 'y'
};

const AXIS = ['xy', 'x', 'y']; const MODE = ['nearest', 'point', 'x', 'y']; let axisIndex = 0; let modeIndex = 0; Utils.srand(8); const data = { labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'], datasets: [{ type: 'line', label: 'Dataset 1', borderColor: 'rgb(54, 162, 235)', borderWidth: 2, fill: false, data: Utils.numbers({count: 7, min: 0, max: 100}), }] };

const AXIS = ['xy', 'x', 'y'];
const MODE = ['nearest', 'point', 'x', 'y'];
let axisIndex = 0;
let modeIndex = 0;
Utils.srand(8);
const data = {
  labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
  datasets: [{
    type: 'line',
    label: 'Dataset 1',
    borderColor: 'rgb(54, 162, 235)',
    borderWidth: 2,
    fill: false,
    data: Utils.numbers({count: 7, min: 0, max: 100}),
  }]
};

function getTitle({chart}) { const options = chart.options.plugins.annotation.interaction; const mode = options.mode || 'nearest'; const axis = options.axis || 'xy'; const intersect = !!options.intersect; return 'Mode: ' + mode + ', axis: ' + axis + ', intersect: ' + intersect; }

function getTitle({chart}) {
  const options = chart.options.plugins.annotation.interaction;
  const mode = options.mode || 'nearest';
  const axis = options.axis || 'xy';
  const intersect = !!options.intersect;
  return 'Mode: ' + mode + ', axis: ' + axis + ', intersect: ' + intersect;
}