Display total in tooltip of stacked area chart

[adeel-usmani]

Is there anyway I can get total number of data along with the data in the tooltip.
Like in the given picture if I want to display the total in the tooltip as well (addition of all these 3 data points)

[sebj54]

I've tried many things and I didn't find a solution to the same problem.

I think the only way is to use a custom tooltip render function but I can't find a way to reuse the default tooltip render function either.

If anyone has any hint on this, it would be very helpful!

[toaster-robotics]

This isn't exactly what you were asking for, but it was good enough for me.

You can customize the "x" text on the tooltip. It'll change it from 17 Feb to 17 Feb (Total: 91)

tooltip: {
            shared: true,
            intersect: false,
            x: {
              formatter: function (
                value,
                { series, seriesIndex, dataPointIndex, w }
              ) {
                const series1Y = series[0][dataPointIndex] || 0;
                const series2Y = series[1][dataPointIndex] || 0;
                const stackedY = series1Y + series2Y;

                return `${
                  data.dates[dataPointIndex]
                } (Total: ${stackedY.toFixed(2)})`;
              },
            },
          },