Grab all external dependencies from package.json

externals.js

/**
 * Usage:
 * import package from './package.json'
 * 
 * externals(package)
 */
function externals(pkg) {
  return Object.keys(pkg).reduce((accumulator, key) => {
    if (key.match(/dependencies/i)) {
      const value = pkg[key];
      return accumulator.concat(Object.keys(value));
    }

    return accumulator;
  }, []);
}


exports default externals