function shouldIgnorePress(e) {
      // Don't react if initial down happens on a form element
      return e.target.tagName.match(IS_INPUT_LIKE_REGEX) ||
             e.target.isContentEditable ||
             e.target.tagName.match(IS_EMBEDDED_OBJECT_REGEX) ||
             e.target.dataset.preventScroll;
    }
whether we've tried to wait for size already