跳至主内容
版本：10.x

Logger 链接

非官方测试版翻译

本页面由 PageTurner AI 翻译（测试版）。未经项目官方认可。 发现错误？ 报告问题 →

loggerLink 是一个用于为 tRPC 客户端实现日志记录功能的链接。它能清晰展示查询、变更或订阅操作及其请求和响应。默认情况下，该链接会在浏览器控制台输出格式化的日志。但您可以通过自定义实现来调整日志记录行为和输出方式。

用法​

您可以通过以下方式导入并将 loggerLink 添加到 links 数组：

client/index.ts
ts
import { createTRPCProxyClient, httpBatchLink, loggerLink } from '@trpc/client';
import type { AppRouter } from '../server';
const client = createTRPCProxyClient<AppRouter>({
  links: [
    /**
     * The function passed to enabled is an example in case you want to the link to
     * log to your console in development and only log errors in production
     */
    loggerLink({
      enabled: (opts) =>
        (process.env.NODE_ENV === 'development' &&
          typeof window !== 'undefined') ||
        (opts.direction === 'down' && opts.result instanceof Error),
    }),
    httpBatchLink({
      url: 'http://localhost:3000',
    }),
  ],
});
client/index.ts
ts
import { createTRPCProxyClient, httpBatchLink, loggerLink } from '@trpc/client';
import type { AppRouter } from '../server';
const client = createTRPCProxyClient<AppRouter>({
  links: [
    /**
     * The function passed to enabled is an example in case you want to the link to
     * log to your console in development and only log errors in production
     */
    loggerLink({
      enabled: (opts) =>
        (process.env.NODE_ENV === 'development' &&
          typeof window !== 'undefined') ||
        (opts.direction === 'down' && opts.result instanceof Error),
    }),
    httpBatchLink({
      url: 'http://localhost:3000',
    }),
  ],
});

loggerLink 函数接收一个符合 LoggerLinkOptions 结构的配置对象：

ts
type LoggerLinkOptions<TRouter extends AnyRouter> = {
  logger?: LogFn<TRouter>;
  /**
   * It is a function that returns a condition that determines whether to enable the logger.
   * It is true by default.
   */
  enabled?: EnabledFn<TRouter>;
  /**
   * Used in the built-in defaultLogger
   */
  console?: ConsoleEsque;
  /**
   * Color mode used in the default logger.
   * @default typeof window === 'undefined' ? 'ansi' : 'css'
   */
  colorMode?: 'ansi' | 'css';
};
ts
type LoggerLinkOptions<TRouter extends AnyRouter> = {
  logger?: LogFn<TRouter>;
  /**
   * It is a function that returns a condition that determines whether to enable the logger.
   * It is true by default.
   */
  enabled?: EnabledFn<TRouter>;
  /**
   * Used in the built-in defaultLogger
   */
  console?: ConsoleEsque;
  /**
   * Color mode used in the default logger.
   * @default typeof window === 'undefined' ? 'ansi' : 'css'
   */
  colorMode?: 'ansi' | 'css';
};

参考文档​

您可以在 GitHub 上查看该链接的源码实现。