js-convert-case/lib/modules/extends/uppercase-keys-object/index.d.ts

JavaScript Convert String and Keys of Object between cases (camelCase, snake_case, PascalCase, dot.case, path/case, text case, Sentence case, Header Case, UPPERCASE, lowercase, kebab-case). Use for both Node.JS and Browser

import { Options } from '../utils';
/**
 * Convert string keys in an object to UPPERCASE format.
 * @param obj: object to convert keys. If `obj` isn't a json object, `null` is returned.
 * @param opt: (optional) Options parameter, default is non-recursive.
 */
export default function upperKeys(obj: any, opt?: Options): object | null;