log4js使用

{
  "appenders": {
    "console": { "type": "console" },
    "file": { "type": "file", "filename": "app.log" }
  },
  "categories": {
    "default": { "appenders": ["console", "file"], "level": "debug" }
  }
}

const log4js = require('log4js');
log4js.configure('path/to/config.json');
const logger = log4js.getLogger();

{
  "appenders": {
    "file": {
      "type": "file",
      "filename": "app.log",
      "maxLogSize": 10485760, // 10MB
      "backups": 3,
      "compress": true
    }
  }
}

async function asyncFunction() {
  try {
    // 异步操作
  } catch (error) {
    logger.error('An error occurred:', error);
  }
}

const log4js = require('log4js');
log4js.configure({
  appenders: { console: { type: 'console' } },
  categories: { default: { appenders: ['console'], level: 'debug' } }
});

const logger = log4js.getLogger();

logger.trace('This is a trace message');
logger.debug('This is a debug message');
logger.info('This is an info message');
logger.warn('This is a warn message');
logger.error('This is an error message');