When exporting a DataTable with 2 levels of grouping enabled to PDF the 2nd tier group rows are not visible. This impacts the PDF export experience for our customers.

Attachments:
- source HTML file,
- PNG of incorrect Prince-rendering
- PNG of web-browser rendering showing the nested elements properly

1. broken-export-no-js-rendered-html.png‎ 85.9 kB ‎
   PNG of the rendered HTML with elements
2. broken-export-no-js-rendered-pdf.png‎ 67.4 kB ‎
   PNG of the rendered PDF without elements
3. broken-export-simplified-no-js.html‎ 1.4 MB ‎
   suspected-to-be-broken HTML file

Hi,

The problem is the following declaration (on line 25933):

.ag-theme-alpine.ag-theme-alpine .ag-ltr
  span[class*="ag-row-group-indent-"]:not(.ag-row-group-indent-0) {

  ...

  content: "";

  ...

}

Prince is replacing the contents of the selected elements with the empty string. You can avoid this problem by removing that line or overriding it with, e.g.:

.ag-theme-alpine.ag-theme-alpine .ag-ltr
  span[class*="ag-row-group-indent-"]:not(.ag-row-group-indent-0) {
    content: normal !important;
}

Mark