Function retrieveTransferredState

packages/core/src/transfer_state.ts:150–169

(
  doc: Document,
  appId: string,
)

}

export function retrieveTransferredState(
  doc: Document,
  appId: string,
): Record<string, unknown | undefined> {
  // Locate the script tag with the JSON data transferred from the server.
  // The id of the script tag is set to the Angular appId + 'state'.
  const script = doc.getElementById(appId + '-state');
  if (script?.tagName === 'SCRIPT' && script.textContent) {
    try {
      // Avoid using any here as it triggers lint errors in google3 (any is not allowed).
      // Decoding of `<` is done of the box by browsers and node.js, same behaviour as G3
      // script_builders.
      return JSON.parse(script.textContent) as {};
    } catch (e) {
      console.warn('Exception while restoring TransferState for app ' + appId, e);
    }
  }

  return {};
}