js 設置cookie，javascript document cookie

摘要：創建cookie document.cookie = "username=wang"; 添加過期時間 document.cookie = "username=John Doe; expires=Sun, 22 Dec 2019 12:00:00 UTC"; 參考: https://www.w3school.com.cn/js/js_cookies.asp

document.cookie = "username=wang";

document.cookie = "username=John Doe; expires=Sun, 22 Dec 2019 12:00:00 UTC";