Function getLineByIndex

src/plugins/plugin.filler/filler.target.js:41–45

* @param {Chart} chart * @param {number} index

(chart, index)

 * @param {number} index
 */
function getLineByIndex(chart, index) {
  const meta = chart.getDatasetMeta(index);
  const visible = meta && chart.isDatasetVisible(index);
  return visible ? meta.dataset : null;
}

function computeBoundary(source) {
  const scale = source.scale || {};