胖子-日志类型

说明

日志( logger) 类型, 临 时 议 题 启发.

货包只装了几分几分几分 createLogger 帮助, 因此库可以依赖于日志合同 而不取决于具体的伐木执行情况.

所需资源

• 节点:

安装

穿过 国家预防机制 作为 @ chubbyts/ chubbyts-log-类型。 。 。 .

npm i @chubbyts/chubbyts-log-types@^3.4.1

使用量

类型

import type {
  Context,
  LogFn,
  Logger,
  LogLevel,
  NamedLogFn,
} from '@chubbyts/chubbyts-log-types/log';

type LogLevel =
  | 'emergency'
  | 'alert'
  | 'critical'
  | 'error'
  | 'warning'
  | 'notice'
  | 'info'
  | 'debug';

type Context = Record<string, unknown>;

type LogFn = (level: LogLevel, message: string, context: Context) => void;
type NamedLogFn = (message: string, context: Context) => void;

// one NamedLogFn per LogLevel, plus the generic log function
type Logger = Record<LogLevel, NamedLogFn> & { log: LogFn };

创建日志

createLogger 单曲 LogFn 并从中衍生出所有具体层次的方法.

import { createLogger } from '@chubbyts/chubbyts-log-types/log';

const logger = createLogger((level, message, context) => {
  const datetime = new Date().toISOString();

  console.log(JSON.stringify({ datetime, level, message, context }));
});

logger.info('User logged in', { userId: 'a1b2c3' });
logger.error('Payment failed', { orderId: 42, reason: 'card declined' });
logger.log('warning', 'Disk space low', { freeBytes: 1_024 });

无效日志

没有争论 createLogger 返回一个丢弃每个消息的日志, 这是一种方便的默认或测试.

import { createLogger } from '@chubbyts/chubbyts-log-types/log';

const logger = createLogger();

logger.debug('This goes nowhere', {});

取决于类型

接受一个 Logger 而不是具体执行.

import type { Logger } from '@chubbyts/chubbyts-log-types/log';
import { createLogger } from '@chubbyts/chubbyts-log-types/log';

export const createUserService = (logger: Logger = createLogger()) => ({
  delete: (id: string) => {
    logger.notice('User deleted', { id });
  },
});

按级别过滤

import type { LogFn, LogLevel } from '@chubbyts/chubbyts-log-types/log';
import { createLogger } from '@chubbyts/chubbyts-log-types/log';

// ordered from most to least severe
const levels: Array<LogLevel> = [
  'emergency',
  'alert',
  'critical',
  'error',
  'warning',
  'notice',
  'info',
  'debug',
];

const createMinLevelLogFn =
  (minLevel: LogLevel, log: LogFn): LogFn =>
  (level, message, context) => {
    if (levels.indexOf(level) <= levels.indexOf(minLevel)) {
      log(level, message, context);
    }
  };

const logger = createLogger(
  createMinLevelLogFn('warning', (level, message, context) => {
    console.log(level, message, context);
  }),
);

logger.error('Shown', {});
logger.info('Suppressed', {});

版权

2026 道米尼克·佐格(英语: