Function mergeScaleConfig

src/core/core.config.js:71–113

(config, options)

}

function mergeScaleConfig(config, options) {
  const chartDefaults = overrides[config.type] || {scales: {}};
  const configScales = options.scales || {};
  const chartIndexAxis = getIndexAxis(config.type, options);
  const scales = Object.create(null);

  // First figure out first scale id's per axis.
  Object.keys(configScales).forEach(id => {
    const scaleConf = configScales[id];
    if (!isObject(scaleConf)) {
      return console.error(`Invalid scale configuration for scale: ${id}`);
    }
    if (scaleConf._proxy) {
      return console.warn(`Ignoring resolver passed as options for scale: ${id}`);
    }
    const axis = determineAxis(id, scaleConf, retrieveAxisFromDatasets(id, config), defaults.scales[scaleConf.type]);
    const defaultId = getDefaultScaleIDFromAxis(axis, chartIndexAxis);
    const defaultScaleOptions = chartDefaults.scales || {};
    scales[id] = mergeIf(Object.create(null), [{axis}, scaleConf, defaultScaleOptions[axis], defaultScaleOptions[defaultId]]);
  });

  // Then merge dataset defaults to scale configs
  config.data.datasets.forEach(dataset => {
    const type = dataset.type || config.type;
    const indexAxis = dataset.indexAxis || getIndexAxis(type, options);
    const datasetDefaults = overrides[type] || {};
    const defaultScaleOptions = datasetDefaults.scales || {};
    Object.keys(defaultScaleOptions).forEach(defaultID => {
      const axis = getAxisFromDefaultScaleID(defaultID, indexAxis);
      const id = dataset[axis + 'AxisID'] || axis;
      scales[id] = scales[id] || Object.create(null);
      mergeIf(scales[id], [{axis}, configScales[id], defaultScaleOptions[defaultID]]);
    });
  });

  // apply scale defaults, if not overridden by dataset defaults
  Object.keys(scales).forEach(key => {
    const scale = scales[key];
    mergeIf(scale, [defaults.scales[scale.type], defaults.scale]);
  });

  return scales;
}

function initOptions(config) {
  const options = config.options || (config.options = {});