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A simple JS script to register your desired course when slots are available.
// ==UserScript==
// @name UMJI Lucky Draw
// @namespace http://tampermonkey.net/
// @version 0.2
// @description
// @author Celeste
// @match https://coursesel.umji.sjtu.edu.cn/welcome.action
// @grant none
// @description A simple JS script to register your desired course when slots are available.
// ==/UserScript==
(function () {
'use strict';
console.log("Lucky Draw Load Successfully.")
let wantedlessonTaskID = ["C926C3CA-F100-0001-F6A7-3FE552D04190"]; // Replace the elements of the array with the lessontaskid of your wanted courses (the lessontaskid can be found by inspect
var timeVar = setInterval(() => { doItEveryTime(); }, 5000);
function doItEveryTime() {
let allClass = document.querySelectorAll("div[lessontaskid]")
console.log("=== A round begins ===")
for (let i = 0; i < allClass.length; i++) {
let thisID = allClass[i].getAttribute("lessontaskid");
if (wantedlessonTaskID.includes(thisID)) {
console.log("---")
console.log(i);
// some of these having the same "lessontaskid" actually do not have buttons
let thisButton
try {
thisButton = allClass[i].getElementsByTagName("button")[0]
}
catch(error){
console.log("skip")
continue
}
let thisCourse = allClass[i];
let state
try {
state = thisButton.innerHTML
}
catch(error){
console.log("skip")
continue
}
console.log("Find the course, status shown below")
console.log(state)
if (state == "Register") {
console.log("Find available!")
thisButton.click();
console.log("Done Registration.")
}
}
}
let refresh = document.getElementsByClassName("refresh")
refresh[0].click();
// Refresh the course list
}
})();