Function createStack

src/core/core.datasetController.js:231–232

(canStack, meta, chart)

const isDirectUpdateMode = (mode) => mode === 'reset' || mode === 'none';
const cloneIfNotShared = (cached, shared) => shared ? cached : Object.assign({}, cached);
const createStack = (canStack, meta, chart) => canStack && !meta.hidden && meta._stacked
  && {keys: getSortedDatasetIndices(chart, true), values: null};

export default class DatasetController {