Integration

const myChart = new Chart(ctx, {...});

Chart.js 3 is tree-shakeable, so it is necessary to import and register the controllers, elements, scales and plugins you are going to use.

For all available imports see the example below.

import { Chart, registerables } from 'chart.js';
Chart.register(...registerables);

And finally there is a separate path to do just the above for you, in one line:

If you want to use the helper functions, you will need to import these separately from the helpers package and use them as stand-alone functions.

import Chart from 'chart.js/auto';
const chart = new Chart(ctx, {
  type: 'line',
  options: {
    onClick: (e) => {
      const canvasPosition = getRelativePosition(e, chart);
      // Substitute the appropriate scale IDs
      const dataX = chart.scales.x.getValueForPixel(canvasPosition.x);
    }
});

Important: RequireJS , so be sure to require one of the UMD builds instead (i.e. dist/chart.js, dist/chart.min.js, etc.).

Note: in order to use the time scale, you need to make sure one of the available date adapters (opens new window) and corresponding date library are fully loaded after requiring Chart.js. For this you can use nested requires:

require(['chartjs'], function(Chart) {
    require(['moment'], function() {
        require(['chartjs-adapter-moment'], function() {
            new Chart(ctx, {...});
        });
});