Function clearStacks

src/core/core.datasetController.js:208–227

(meta, items)

}

function clearStacks(meta, items) {
  // Not using meta.index here, because it might be already updated if the dataset changed location
  const datasetIndex = meta.controller.index;
  const axis = meta.vScale && meta.vScale.axis;
  if (!axis) {
    return;
  }

  items = items || meta._parsed;
  for (const parsed of items) {
    const stacks = parsed._stacks;
    if (!stacks || stacks[axis] === undefined || stacks[axis][datasetIndex] === undefined) {
      return;
    }
    delete stacks[axis][datasetIndex];
    if (stacks[axis]._visualValues !== undefined && stacks[axis]._visualValues[datasetIndex] !== undefined) {
      delete stacks[axis]._visualValues[datasetIndex];
    }
  }
}

const isDirectUpdateMode = (mode) => mode === 'reset' || mode === 'none';
const cloneIfNotShared = (cached, shared) => shared ? cached : Object.assign({}, cached);