众所周知，源代码是最好的文档，所以请自行阅读源代码获取具体用法，简介可从函数名里读出。

Utility Functions

Logs

• log(f, ...s)
• warn(f, ...s)
• error(f, ...s)

Extensions

• Date.prototype.format(f, UTC)
• String.prototype.toInitialCase()
• cur_time(ratio = 1)
• jQuery.fn.whenKey(keyCode, callback) or jQuery.fn.whenKey({ ...keyCode: callback })

Network

• lg_content(url)
• lg_post(url, data)
• cs_get({ url, onload }) and cs_get2(url) -> Promise
• cs_post(url, data, header, type)

Notifications

• lg_alert(msg, title)
• exlg_alert(text = "", title = "exlg 提醒您", onaccepted = () => {}, autoquit = true)

Misc

• judge_problem(text)