in src/barChart.ts [1181:1196]
function getIndexForDataMax(arr) {
if (arr.length < 1) {
return 0;
}
let i = 0;
let p = 0;
let max = arr[i].value;
for (i = 1; i < arr.length; i++) {
if (arr[i].value > max) {
max = arr[i].value;
p = i;
}
}
return p;
}