Function ref

test/chart.test.tsx:18–25

(el: ChartJS<any> | undefined | null)

  let chart: any, update: any, destroy: any;
  const ref = (el: ChartJS<any> | undefined | null): void => {
    chart = el;

    if (chart) {
      update = vi.spyOn(chart, 'update');
      destroy = vi.spyOn(chart, 'destroy');
    }
  };

  beforeEach(() => {
    chart = null;