web-worker-mouse-events.ts

let mouseMoveEnabled: boolean = false;

function mousemove(data: any): void {
   if (!mouseMoveEnabled) return;
   const tooltip = chart.tooltip;
   const mousePoint = { x: data.x, y: data.y };
   const nearest1 = getNearestElementByX(chart.getDatasetMeta(0), mousePoint);
   const nearest2 = getNearestElementByX(chart.getDatasetMeta(1), mousePoint);
   if (!isTouched(nearest1, mousePoint) && !isTouched(nearest2, mousePoint)) {
      tooltip.setActiveElements([]);
   } else {
      const nearest = getNearestTouched(nearest1, nearest2, mousePoint);
      tooltip.setActiveElements([nearest]);
   }
   chart.update();
}

function mouseenter(): void {
   mouseMoveEnabled = true;
}

function mouseleave(): void {
   mouseMoveEnabled = false;
   const tooltip = chart.tooltip;
   tooltip.setActiveElements([]);
   chart.update();
}

const handlers = {
   // ...
   mousemove,
   mouseenter,
   mouseleave,
};