ut2/types/tryit.d.ts

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

import { AsyncFn, SyncFn } from './internals/types';
interface Tryit {
    <P extends any[], R>(fn: AsyncFn<P, R>): (...args: P) => Promise<[null, R] | [Error, undefined]>;
    <P extends any[], R>(fn: SyncFn<P, R>): (...args: P) => [null, R] | [Error, undefined];
}
/**
 * 包装一个函数（支持异步函数），将其转为错误优先函数。
 *
 * @alias module:Util.tryit
 * @since 1.13.0
 * @param {Function} fn 要包装的函数。
 * @returns 如果执行成功返回 `[null, result]`，否则返回 `[Error, undefined]`。
 * @example
 * const getGreet = async (name: string) => {
 *   return 'hello ' + name;
 * }
 * const [err, result] = await tryit(getGreet)('jeff');
 * console.log([err, result]);
 * // [null, 'hello jeff']
 *
 *
 * const errorFn = async (name: string) => {
 *   throw new Error('error message');
 *   return 'hello ' + name;
 * }
 * const [err2, result2] = await tryit(errorFn)('jeff');
 * console.log([err2, result2]);
 * // [Error: error message, undefined]
 */
declare const tryit: Tryit;
export default tryit;