export default function whenProps(selector, callback, interval = 50) {

	const el = document.querySelector(selector);
	const reactKey = findReactKey(el);

	if (el &&
			el[reactKey] &&
			el[reactKey]._currentElement &&
			el[reactKey]._currentElement.props &&
			el[reactKey]._currentElement.props.title
	) {

		return callback(selector);

	} else {

	  const next = whenProps.bind(null, selector, callback, interval);
	  return setTimeout(next, interval);

	}
}


function findReactKey(elm) {
	if (!elm) return false;

  const objectKeys = Object.keys(elm);
  const reactKey = objectKeys.filter(function(key) {
    if (key.indexOf('__reactInternalInstance') > -1) return key;
  });

  return reactKey[0];
}