variable-type/lib/types/optional.d.ts

Runtime type checking for variable and similar objects.

/**
 * Created by hustcc on 17/08/01.
 */
import Type from '../Type';
/**
 * convert a type into optional.
 * 扩展运算，可选的校验
 * @param type
 * @returns Type
 */
export default function (type: Type): Type;