function getAttrs(html) {
  var i = _.spaceIndex(html);
  if (i === -1) {
    return {
      html: "",
      closing: html[html.length - 2] === "/",
    };
  }
  html = _.trim(html.slice(i + 1, -1));
  var isClosing = html[html.length - 1] === "/";
  if (isClosing) html = _.trim(html.slice(0, -1));
  return {
    html: html,
    closing: isClosing,
  };
}
get attributes for a tag

@param {String} html
@return {Object}
  - {String} html
  - {Boolean} closing