需要帮助使Winston 3.0将Puppeteer输出写入日志文件

Question

我的目标：了解使用Winston 3.0是否可以将Puppeteer控制台错误/警告输出记录到文件中以及如何实现。

到目前为止我所知道的：我现在可以运行Puppeteer和Winston成功捕获一组URL的屏幕截图。但是，即使Winston确实创建了日志文件，它也不会向其写入任何内容。

我不知道的事情：我找不到解释如何的文档。Winston知道将Puppeteer控制台信息写入该文件。我的代码如下：

'use strict';

const winston = require('winston');
const puppeteer = require('puppeteer');


// As of winston@3, the default logging format is JSON.
/* Adding Winston code here */

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


/* End primary Winston code */

/* Pupetteer loop code begins here */
const qaurls = ["https://www.urlnumber1.com/",
"https://urlnumber2.com/",
"https://www.urlnumber3.com/",
"https://urlnumber4.org/"
];

var parseurl = require('url');

puppeteer.launch({headless: false}).then(async browser => {

    let page = await browser.newPage();
    await page.setViewport({width: 1103, height: 1440});
        for (var i = 0; i < qaurls.length; i++) {
            var url = qaurls[i];
            console.log('SCANNING ' + url);
            var url_parts = parseurl.parse(url);
            await page.goto(url);
            var screenshot_name = i + '_screenshot_' + url_parts.hostname + '.png';
            await page.screenshot({path: screenshot_name});
            console.log('Screenshot = ' + screenshot_name);
            logger.log('silly', 'Hello, this is a raw logging event');
}

await browser.close();
});