Expenses-Chart

Just had fun with ChartJS myself. The docs could probably be better but I found some things you might be looking for in particular :

   let myChart = new Chart("myChart", {
        type: "bar",
        data: { },
        options: {
            elements: {
                  bar: {
                       borderRadius: 'your value here',
                       borderSkipped: false,
                  } 
            }
        }

Tooltips are a little trickier. I played with these in the console till I got what I wanted.

   let myChart = new Chart("myChart", {
        type: "bar",
        data: { },
        options: {
           plugins: {
            tooltip: {
              callbacks: {
                title: function (context) {
                  context = "$" + context[0].formattedValue;
                  return context;
                },
                label: function (context) {
                  context = "";
                  return context;
                },
              },
            }
        }

My code here if you want some specific references to how I handled it. Hope this helps