map

Process data with mapping operations. Similar to Array.prototype.map.

Getting Started

const data = [
  { a: 1, b: 2, c: 3 },
  { a: 4, b: 5, c: 6 },
];

chart.options({
  type: 'view',
  data: {
    type: 'inline',
    value: data,
    transform: [
      {
        type: 'map',
        callback: (datum, idx) => ({ ...datum, idx }),
      },
    ],
  },
});

After the above example is processed, the data becomes:

[
  { a: 1, b: 2, c: 3, idx: 0 },
  { a: 4, b: 5, c: 6, idx: 1 },
];

Options