log4js 输出日志

1.安装 npm i log4js --S

代码示例

log4js.configure({
  appenders: {
    file: {
      type: "file",
      filename: "app.log",
      layout: {
        type: "pattern",
        pattern: "%r %p - %m",
      },
    },
  },
  categories: {
    default: {
      appenders: ["file"],
      level: "debug",
    },
  },
});
const logger = log4js.getLogger();
logger.debug("message,room:515235416");