vueecharts/src/demo/data/bar.js

function random() {
  return Math.round(300 + Math.random() * 700) / 10;
}

export default function getData() {
  return {
    textStyle: {
      fontFamily: 'Inter, "Helvetica Neue", Arial, sans-serif',
      fontWeight: 300
    },
    dataset: {
      dimensions: ["Product", "2015", "2016", "2017"],
      source: [
        {
          Product: "Matcha Latte",
          2015: random(),
          2016: random(),
          2017: random()
        },
        {
          Product: "Milk Tea",
          2015: random(),
          2016: random(),
          2017: random()
        },
        {
          Product: "Cheese Cocoa",
          2015: random(),
          2016: random(),
          2017: random()
        },
        {
          Product: "Walnut Brownie",
          2015: random(),
          2016: random(),
          2017: random()
        }
      ]
    },
    xAxis: { type: "category" },
    yAxis: {},
    // Declare several bar series, each will be mapped
    // to a column of dataset.source by default.
    series: [{ type: "bar" }, { type: "bar" }, { type: "bar" }]
  };
}