Method _updateHoverStyles

src/core/core.controller.js:1145–1158

* @private

(active, lastActive, replay)

	 * @private
	 */
  _updateHoverStyles(active, lastActive, replay) {
    const hoverOptions = this.options.hover;
    const diff = (a, b) => a.filter(x => !b.some(y => x.datasetIndex === y.datasetIndex && x.index === y.index));
    const deactivated = diff(lastActive, active);
    const activated = replay ? active : diff(active, lastActive);

    if (deactivated.length) {
      this.updateHoverStyle(deactivated, hoverOptions.mode, false);
    }

    if (activated.length && hoverOptions.mode) {
      this.updateHoverStyle(activated, hoverOptions.mode, true);
    }
  }

  /**
	 * @private