_sketch.html.haml

.file-content#js-sketch-viewer{ data: { endpoint: blob_raw_path } }
  .js-loading-icon.text-center.gl-mt-3.gl-mb-3.js-loading-icon{ 'aria-label' => 'Loading Sketch preview' }
    = icon('spinner spin 2x', 'aria-hidden' => 'true');