In G2, the Legend can be understood as the visualization of the non-spatial channel (color, opacity, size, shape) corresponding to the scale.

The legend can be configured at the mark level:

({
  type: 'interval',
  legend: {
    color: {},
    size: {},
  },
});

// API
// First method
chart.interval().legend('color', {}).legend('size', {});

// Second method
chart.interval().legend({
  color: {},
  size: {},
});

Legends can also be configured at the view level:

({
  type: 'view',
  legend: {
    color: {},
    size: {},
  },
});

Mark Legend

In G2, each mark has its own legend. If the scale corresponding to the mark is synchronized, the legends will be merged.

View Legend

The legend has transitivity. The legend declared on the view will be passed to the children declared mark. If the mark has a corresponding channel legend, it will be merged; otherwise, it will not be affected.

Hide Legend

Hide the legend of each channel:

({
  type: 'interval',
  legend: { color: false }, // Hide the legend of the color channel
});

Hide multiple legends:

({
  type: 'interval',
  legend: false,
});