Function appendSsrContentIntegrityMarker

packages/platform-server/src/utils.ts:133–139

* Creates a marker comment node and append it into the ` `. * Some CDNs have mechanisms to remove all comment node from HTML. * This behaviour breaks hydration, so we'll detect on the client side if this * marker comment is still available or else throw an error

(doc: Document)

 * marker comment is still available or else throw an error
 */
function appendSsrContentIntegrityMarker(doc: Document) {
  // Adding a ng hydration marker comment
  const comment = doc.createComment(SSR_CONTENT_INTEGRITY_MARKER);
  doc.body.firstChild
    ? doc.body.insertBefore(comment, doc.body.firstChild)
    : doc.body.append(comment);
}

/**
 * Adds the `ng-server-context` attribute to host elements of all bootstrapped components