Crawl course info from timetable.nctu.edu.tw. Remember to install "superagent" package from npm.

crawl-course-info.js

const agent = require("superagent")

var domain = "https://timetable.nctu.edu.tw/";
var searchUrl = "?r=main/get_cos_list";
var academicYear = "109";
var semester = "1";
var courseNumber = "1144";

agent
  .post(domain + searchUrl)
  .type("form")
  .send({ m_acy: academicYear })
  .send({ m_sem: semester })
  .send({ m_acyend: academicYear })
  .send({ m_semend: semester })
  .send({ m_degree: "**" })
  .send({ m_dep_uid: "**" })
  .send({ m_group: "**" })
  .send({ m_grade: "**" })
  .send({ m_class: "**" })
  .send({ m_option: "cos_id" })
  .send({ m_crsname: "**" })
  .send({ m_teaname: "**" })
  .send({ m_cos_id: courseNumber })
  .send({ m_cos_code: "**" })
  .send({ m_crstime: "**" })
  .send({ m_crsoutline: "**" })
  .send({ m_costype: "**" })
  .end(function (err, res) {
    res = JSON.parse(res.text);
    try {
      var courses = res[Object.keys(res)[0]]["1"];
      var course = courses[Object.keys(courses)[0]];
      console.log({
        number: course["cos_id"],
        name: course["cos_cname"],
        registered_num: course["reg_num"],
        lecturer: course["teacher"]
      });
    } catch (e) {
      console.log({ error: true });
    }
  });