log4js-node：node.js日志框架输出到文件

node -v
v16.14.0
pnpm install log4js

{
  "type": "module",
  "dependencies": {
    "log4js": "^6.6.1"
  }
}

import log4js from "log4js";
const logger = log4js.getLogger();
logger.level = "debug";
logger.debug("Some debug messages");

$ node app.js
[2022-08-14T17:28:38.108] [DEBUG] default - Some debug messages

// log4js.config.js
export default {
  appenders: {
    output: {
      type: "file",
      filename: "logger.log",
      maxLogSize: "1K", //  K, M, G
      backups: 3,
      compress: false,
      layout: {
        type: "pattern",
        pattern: "[%d{yyyy-MM-dd hh:mm:ss}] [%p] %f{1} line-%l: %m",
      },
    },
  },
  categories: {
    default: {
      appenders: ["output"],
      level: "debug",
      enableCallStack: true
    },
  },
};

// app.js
import log4js from "log4js";
import log4jsConfig from "./log4js.config.js";
// 配置
log4js.configure(log4jsConfig);
const logger = log4js.getLogger();
logger.debug("Some debug messages");

[2022-08-14 18:14:08] [DEBUG] app.js line-18: Some debug messages