Fossil

        P.e.markupAlignWrapper.classList[showIt ? 'remove' : 'add']('hidden');
      };
      f.getMarkupAlignmentClass = function(){
        if(P.e.markupAlignCenter.checked) return ' center';
        else if(P.e.markupAlignIndent.checked) return ' indent';
        return '';
      };
      /* Parses P.response.raw as HTML without using innerHTML. */
      f.parseResponse = function(tgt){
        let childs;
        if(P.response.raw){
          const newNode = new DOMParser().parseFromString(P.response.raw, 'text/html');
          childs = newNode.documentElement.querySelectorAll('body > *');
        }else{
          childs = [];
        }
        D.append(D.clearElement(tgt), childs);
      };
    }
    const preTgt = this.e.previewTarget;
    if(this.response.isError){
      f.parseResponse(preTgt);
      D.addClass(preTgt, 'error');
      this.e.previewModeLabel.innerText = "Error";
      return;
    }
    D.removeClass(preTgt, 'error');
    D.removeClass(this.e.previewCopyButton, 'disabled');
    D.removeClass(this.e.markupAlignWrapper, 'hidden');
    D.enable(this.e.previewModeToggle, this.e.markupAlignRadios);
    let label;
    switch(this.previewMode){
    case 0:
      label = "SVG";
      f.showMarkupAlignment(false);
      f.parseResponse(preTgt);
      this.e.taPreviewText.value =
        this.response.raw.replace(f.rxNonce, '')/*for copy button*/;
      break;
    case 1:
      label = "Markdown";
      f.showMarkupAlignment(true);
      this.e.taPreviewText.value = [