How get sum of total values in stackedBar ChartJs

Question

I\'m trying to get the sum of all values of a stackedBar and include this total in tooltip.

Note: my datasets aren\'t static, this is an example

Answer 1

In the other answers you replace the last dataset, with this you don't need to

tooltips: {
    callbacks: {
        title: function(tooltipItems, data) {
            return _this.chart.data.labels[tooltipItems[0].index];
        },
        footer: function(tooltipItems, data) {
            let total = 0;
            for (let i = 0; i < tooltipItems.length; i++) {
                total += parseInt(tooltipItems[i].yLabel, 10);
            }
            return 'Total: ' + total;
        }
    }
}

Ps: It's typescript lang.