docs: function(fragment, options) {
        if (!History.started) return false;
        if (!options || options === true) options = {trigger: !!options};
  
        var url = this.root + (fragment = this.getFragment(fragment || ''));
  
        // Strip the hash for matching.
        fragment = fragment.replace(pathStripper, '');
  
        if (this.fragment === fragment) return;
        this.fragment = fragment;
  
        // Don't include a trailing slash on the root.
        if (fragment === '' && url !== '/') url = url.slice(0, -1);
  
        // If pushState is available, we use it to set the fragment as a real URL.
        if (this._hasPushState) {
          this.history[options.replace ? 'replaceState' : 'pushState']({}, document.title, url);
  
        // If hash changes haven't been explicitly disabled, update the hash
        // fragment to store history.
        } else if (this._wantsHashChange) {
          this._updateHash(this.location, fragment, options.replace);
          if (this.iframe && (fragment !== this.getFragment(this.getHash(this.iframe)))) {
            // Opening and closing the iframe tricks IE7 and earlier to push a
            // history entry on hash-tag change.  When replace is true, we don't
            // want this.
            if(!options.replace) this.iframe.document.open().close();
            this._updateHash(this.iframe.location, fragment, options.replace);
          }
  
        // If you've told us that you explicitly don't want fallback hashchange-
        // based history, then `navigate` becomes a page refresh.
        } else {
          return this.location.assign(url);
        }
        if (options.trigger) return this.loadUrl(fragment);
      }