lib/utils/get-loader-options.js
function getLoaderOptions(loaderPath, rule) {
  let multiRuleProp;

  if (isWebpack1) {
    multiRuleProp = 'loaders';
  } else if (rule.oneOf) {
    multiRuleProp = 'oneOf';
  } else {
    multiRuleProp = 'use';
  }

  const multiRule = typeof rule === 'object' && Array.isArray(rule[multiRuleProp]) ? rule[multiRuleProp] : null;
  let options;

  if (multiRule) {
    const rules = [].concat(...multiRule.map(r => (r.use || r)));
    options = rules.map(normalizeRule).find(r => loaderPath.includes(r.loader)).options;
  } else {
    options = normalizeRule(rule).options;
  }

  return options;
}
function getLoaderOptions(loaderPath, rule) {
  let multiRuleProp;

  if (isWebpack1) {
    multiRuleProp = 'loaders';
  } else if (rule.oneOf) {
    multiRuleProp = 'oneOf';
  } else {
    multiRuleProp = 'use';
  }

  const multiRule = typeof rule === 'object' && Array.isArray(rule[multiRuleProp]) ? rule[multiRuleProp] : null;
  let options;

  if (multiRule) {
    const rules = [].concat(...multiRule.map(r => (r.use || r)));
    options = rules.map(normalizeRule).find(r => loaderPath.includes(r.loader)).options;
  } else {
    options = normalizeRule(rule).options;
  }

  return options;
}
webpack 1 compat loader options finder. Returns normalized options.
@param {string} loaderPath
@param {Object|Rule} rule
@return {Object|null}