# 10-常见模块

* 日志打印: `log4js`

```js
const log4js = require('log4js')

log4js.configure({
  appenders: { console: { type: "console" } },
  categories: { default: { appenders: ["console"], level: "info" } },
});

const logger = log4js.getLogger()
```

* 有 cookies缓存功能的的 http 请求库: `Superagent`