π:1
You can use the dataset option barPercentage
as described here.
In you code, this could look as follows:
barChartData: ChartDataSets[] = [
{
label: 'My Dataset',
data: [65, 56, 40],
barPercentage: 0.5
}
];
π:0
Just insert static data for testing purpose and set barThickness property instead of barPercentage. It worked for me.