Tag: countdown

Only the code is, give it a date, it will count down how many days, hours, minutes, and seconds are left when an event & # 39; countDown & # 39; is issued and once 0 has expired, the event & # 39; has expired & # 39; is.

How can this code be improved?

Class DateCountDown {
Listener: Map <String, Array>;

Constructor (date: date) {

this.startCountDown (date);
this.listeners = new Map ();
this.listeners.set ("countDown") []);
this.listeners.set ("expired", []);
}

on (eventName: "countDown"), listener: (values: CountDownValues) => void);
on (eventName: "expired", listener: (isExpired: boolean) => void);
a (eventName: string, Listener: Function) {
this.listeners.get (eventName) .push (listener);
}


startCountDown (date: date) {
constant thousand = 1000;
const sixty = 60;
const twenty four = 24;

const timer = setInterval (()) => {
const now = new date (). getTime ();
const t = date.valueOf () - now;

const days = Math.floor (t / (thousand * sixty * sixty * twenty-four)));
const hours = Math.floor ((t% (one thousand * sixty * sixty * twenty four)) / (one thousand * sixty * sixty));
const minutes = Math.floor ((t% (one thousand * sixty * sixty)) / (one thousand * sixty));
const seconds = Math.floor ((t% (thousand * sixty)) / thousand);

if (t <= 0) {
                clearInterval(timer);
                this.listeners.get("expired").forEach(listener =>
                    Listener (true));
Return;
}

this.listeners.get ("countDown"). forEach (listener =>
Listener (new CountDownValues ​​(days, hours, minutes, seconds))
);
}, 1000);
}
}
Class CountDownValues ​​{
Days: number;
Hours: number;
Minutes: number;
Seconds: number;

Constructor (days: number, hours: number, minutes: number, seconds: number) {
this.ays = days;
this.hours = hours;
this.minutes = minutes;
this.seconds = seconds;
}

}
var date = new date ();
date.setSeconds (date.getSeconds () + 20);

let countDown = new DateCountDown (date);

countDown.on ("countDown", values ​​=> {
console.log ("from first", values);
});
countDown.on ("expired", isExpired => {
console.log ("expired:", isExpired);
});