declare function camelize(str: string): string;
declare function isNumeric(str: string): boolean;
declare function isJSONString(str: unknown): boolean;
declare function capitalize(str: string): string;
declare function strEnum<T extends string>(o: readonly T[]): {
    readonly [K in T]: K;
};
declare function camelToCapitalize(str: string): string;
declare function camelToCapitalized(str: string): string;
declare function getInitials(name: string): string;
declare function capitalizedToCamel(str: string): string;
declare function encodeHTML(str: string): string;
declare function decodeHTML(str: string): string;
declare function truncate(str: string, maxLength: number, suffix?: string): string;
declare function kebabCase(str: string): string;
declare function snakeCase(str: string): string;
declare function pascalCase(str: string): string;
/**
+ * Replaces [key] placeholders with values from `data`.
+ * - Leaves the placeholder intact when `data[key]` is `undefined`.
+ * - Coerces defined values to string via String(...).
+ */
declare function substituteVariables(template: string, data: Record<string, string | number | boolean | null | undefined>): string;
declare function hasUppercase(word: string): boolean;
declare function getFirstUpperChars(word: string, maxLength?: number): string;

export { camelToCapitalize, camelToCapitalized, camelize, capitalize, capitalizedToCamel, decodeHTML, encodeHTML, getFirstUpperChars, getInitials, hasUppercase, isJSONString, isNumeric, kebabCase, pascalCase, snakeCase, strEnum, substituteVariables, truncate };