Node.js日志之winston

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level 'info' Log only if info.level is less than or equal to this level
levels winston.config.npm.levels Levels (and colors) representing log priorities
format winston.format.json Formatting for info messages (see: Formats)
transports [] (No transports) Set of logging targets for info messages
exitOnError true If false, handled exceptions will not cause process.exit
silent false If true, all logs are suppressed
const levels = {
  error: 0,
  warn: 1,
  info: 2,
  http: 3,
  verbose: 4,
  debug: 5,
  silly: 6
};

如果logger的level是warn,下面的代码中只有 warn和error生效。

const logger = winston.createLogger({
  level: 'warn',
  transports: [
    new winston.transports.Console(),
    new winston.transports.File({ filename: 'combined.log' })
  ]
});
logger.error('error message')
logger.warn('warn message')
logger.info('info message')

控制台输出的和’combined.log文件存储的都只有:

{"level":"error","message":"error message"}
{"level":"warn","message":"warn message"}
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wujingquan
版权声明:本站原创文章,由 wujingquan 于2024-07-05发表,共计814字。
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