@rjsf/utils/src/allowAdditionalItems.ts

Utility functions for @rjsf/core

import isObject from './isObject';
import { RJSFSchema, StrictRJSFSchema } from './types';

/** Checks the schema to see if it is allowing additional items, by verifying that `schema.additionalItems` is an
 * object. The user is warned in the console if `schema.additionalItems` has the value `true`.
 *
 * @param schema - The schema object to check
 * @returns - True if additional items is allowed, otherwise false
 */
export default function allowAdditionalItems<S extends StrictRJSFSchema = RJSFSchema>(schema: S) {
  if (schema.additionalItems === true) {
    console.warn('additionalItems=true is currently not supported');
  }
  return isObject(schema.additionalItems);
}