echarts.js

overview.props.$chart.getModel().getSeriesByName('uniqUsers')[0].getData().getVisual('color')

// Adaptive labels
// https://github.com/apache/incubator-echarts/issues/8841#issuecomment-516034572
echarts.registerLayout(ecModel => {
  ecModel.eachSeries(seriesComponent => {
    const data = seriesComponent.getData();
    data.each(idx => {
      const layout = data.getItemLayout(idx);

      if (layout) {
        const dataItem = data.getRawDataItem(idx);
        const seriesName = seriesComponent.name;
        const label = `${seriesName} | ${dataItem.value}`;
        const seriesLabelModel = seriesComponent.getModel("label");
        const itemLabelModel = data.getItemModel(idx).getModel("label");

        itemLabelModel.mergeOption({
          ...seriesLabelModel.option,
          ...itemLabelModel.option
        });
        const labelRect = itemLabelModel.getTextRect(label);
        const labelFits =
          layout.width >= labelRect.height &&
          Math.abs(layout.height) >= labelRect.width;
        itemLabelModel.mergeOption({ show: labelFits });
      }
    });
  });
});
const chart = echarts.init(container);
chart.setOption(option, true);

window.addEventListener("resize", debounce(() => chart.resize()), 200);