type-fns/dist/checks/isNotNull.d.ts

A set of types, type checks, and type guards for simpler, safer, and easier to read code.

/**
 * narrows the type to remove undefined
 *
 * ref
 * - https://stackoverflow.com/a/63045455/3068233
 */
export type NotNull<T> = T extends null ? never : T;
/**
 * checks whether the value is not undefined
 */
export declare const isNotNull: <T>(val: T) => val is NotNull<T>;