Function validateSiblingNodeExists

packages/core/src/hydration/error_handling.ts:126–138

(node: RNode | null)

 * Validates that a given node has sibling nodes
 */
export function validateSiblingNodeExists(node: RNode | null): void {
  validateNodeExists(node);
  if (!node!.nextSibling) {
    const header = 'During hydration Angular expected more sibling nodes to be present.\n\n';
    const actual = `Actual DOM is:\n\n${describeDomFromNode(node!)}\n\n`;
    const footer = getHydrationErrorFooter();

    const message = header + actual + footer;

    markRNodeAsHavingHydrationMismatch(node!, '', actual);
    throw new RuntimeError(RuntimeErrorCode.HYDRATION_MISSING_SIBLINGS, message);
  }
}

/**
 * Validates that a node exists or throws