build/web/c0.js
function isValidID(id) {
  return id === '' || (
    id.charAt(0) === SEPARATOR && id.charAt(id.length - 1) !== SEPARATOR
  );
}
function isValidID(id) {
  return id === '' || (
    id.charAt(0) === SEPARATOR && id.charAt(id.length - 1) !== SEPARATOR
  );
}
function isValidID ( id ) { return id === '' || ( id . charAt ( 0 ) === SEPARATOR && id . charAt ( id . length - 1 ) !== SEPARATOR ) ; }
Checks if the supplied string is a valid React DOM ID.

@param {string} id A React DOM ID, maybe.
@return {boolean} True if the string is a valid React DOM ID.
@private
Checks if the supplied string is a valid React DOM ID .