algebra/src/toData.js

means completeness and balancing, from the Arabic word الجبر

const no = require('not-defined')

/**
 * Extract data attribute, if any, and check it
 *
 * @param {*} arg
 *
 * @returns {*} data
 */

function toData (arg) {
  let data

  if (no(arg.data)) data = arg
  else data = arg.data

  if (no(data)) throw new TypeError('No data')

  return data
}

module.exports = toData