study_express/4-xzswn/04-opf.js

const puppeteer = require('puppeteer');
const fs = require("fs");
const utils = require('./utils/base');
const $xindaming = require('./xindaming');
const $name = require('./03-name');
utils.opf($name, $xindaming).then(res => {
  fs.writeFileSync(`./book/${$name}.opf`, res);
});