let current_datetime = new Date()
let formatted_date = current_datetime.getFullYear() + "-" + (current_datetime.getMonth() + 1) + "-" + current_datetime.getDate() + " " + current_datetime.getHours() + ":" + current_datetime.getMinutes() + ":" + current_datetime.getSeconds()
console.log(formatted_date) // 2020-5-26 9:51:16