study_express/3-qula/03-opf.js

const puppeteer = require('puppeteer');
const fs = require("fs");
const utils = require('./utils/base');
var $xindaming = require('./xindaming');

utils.opf(utils.name, $xindaming).then(res => {
  fs.writeFileSync('./book/' + utils.name + '.opf', res);
});