Method _getNearestPoint

src/component/tooltip/TooltipView.ts:883–903

(
        point: number[],
        tooltipDataParams: TooltipCallbackDataParams | TooltipCallbackDataParams[],
        trigger: TooltipOption['trigger'],
        borderColor: ZRColor,
        defaultBorderColor: ZRColor
    )

    }

    private _getNearestPoint(
        point: number[],
        tooltipDataParams: TooltipCallbackDataParams | TooltipCallbackDataParams[],
        trigger: TooltipOption['trigger'],
        borderColor: ZRColor,
        defaultBorderColor: ZRColor
    ): {
        color: ZRColor;
    } {
        if (trigger === 'axis' || isArray(tooltipDataParams)) {
            return {
                color: borderColor || defaultBorderColor
            };
        }

        if (!isArray(tooltipDataParams)) {
            return {
                color: borderColor || tooltipDataParams.color || tooltipDataParams.borderColor
            };
        }
    }

    _updatePosition(
        tooltipModel: Model<TooltipOption>,