first-child-shim/index.js

Shim for retrieving firstChild in a node environment.

module.exports = function firstChildShim (element) {
  if (!element) {
    return null
  }

  if (element.hasOwnProperty('firstChild')) {
    return element
  }

  function firstChild () {
    return element && element.childNodes && element.childNodes[0] || null
  }

  Object.defineProperty(
    element,
    'firstChild',
    {
      get: firstChild
    }
  )

  return element
}