Function normalizeNode

packages/core/src/lib/plugins/node-id/NodeIdPlugin.ts:243–280

(node: Descendant, path: number[])

  }

  const normalizeNode = (node: Descendant, path: number[]): Descendant => {
    let nextNode = node;
    let childrenChanged = false;

    if (shouldAssignNodeId([node, path], options)) {
      nextNode = {
        ...node,
        [idKey]: idCreator(),
      };
    }

    if (ElementApi.isElement(node)) {
      const nextChildren = node.children.map((child, index) => {
        const nextChild = normalizeNode(child as Descendant, [...path, index]);

        if (nextChild !== child) {
          childrenChanged = true;
        }

        return nextChild;
      });

      if (childrenChanged) {
        nextNode =
          nextNode === node
            ? {
                ...node,
                children: nextChildren,
              }
            : {
                ...nextNode,
                children: nextChildren,
              };
      }
    }

    return nextNode;
  };

  let valueChanged = false;