@leancodepl/utils/src/lib/ensureDefined.d.ts

Common utility functions and React hooks for web applications

/**
 * Ensures that a value is defined, returning it if defined or throwing an error if undefined.
 *
 * @template T - The type of the value being checked
 * @param value - The value to ensure is defined
 * @param message - Optional error message to use if the value is undefined
 * @returns The value if it is defined
 * @throws {Error} When the value is undefined
 * @example
 * ```typescript
 * function processUser(user?: User) {
 *   const definedUser = ensureDefined(user);
 *   return definedUser.name; // definedUser is guaranteed to be defined
 * }
 * ```
 */
export declare function ensureDefined<T>(value: T | undefined, message?: string): T;