Creating a count down clock in typescript
0
$begingroup$
Just of the code is, you give it a date, it will start counting down how many days, hours, minutes and seconds left by emitting an event 'countDown' and once 0 is reached 'expired' event is emitted.
How can this code be improved?
class DateCountDown {
listeners: Map<string, Array<Function>>;
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);
on(eventName: string, listener: Function) {
this.listeners.get(eventName).push(listener);
}
startCountDown(date: Date) {
const thousand = 1000;
const sixty = 60;
const twentyfour = 24;
const timer = setInterval(() => {
const now = new Date().getTime();
const t = date.valueOf() - now;
const days = Math.floor(t / (thousand * sixty * sixty * twentyfour));
const hours = Math.floor((t % (thousand * sixty * sixty * twentyfour)) / (thousand * sixty * sixty));
const minutes = Math.floor((t % (thousand * sixty * sixty)) / (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.days = 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);
});
javascript typescript
asked 2 hours ago
ZoinkyZoinky
1112
$endgroup$
add a comment |
0
$begingroup$
Just of the code is, you give it a date, it will start counting down how many days, hours, minutes and seconds left by emitting an event 'countDown' and once 0 is reached 'expired' event is emitted.
How can this code be improved?
class DateCountDown {
listeners: Map<string, Array<Function>>;
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);
on(eventName: string, listener: Function) {
this.listeners.get(eventName).push(listener);
}
startCountDown(date: Date) {
const thousand = 1000;
const sixty = 60;
const twentyfour = 24;
const timer = setInterval(() => {
const now = new Date().getTime();
const t = date.valueOf() - now;
const days = Math.floor(t / (thousand * sixty * sixty * twentyfour));
const hours = Math.floor((t % (thousand * sixty * sixty * twentyfour)) / (thousand * sixty * sixty));
const minutes = Math.floor((t % (thousand * sixty * sixty)) / (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.days = 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);
});
javascript typescript
asked 2 hours ago
ZoinkyZoinky
1112
$endgroup$
add a comment |
0
0
0
$begingroup$
Just of the code is, you give it a date, it will start counting down how many days, hours, minutes and seconds left by emitting an event 'countDown' and once 0 is reached 'expired' event is emitted.
How can this code be improved?
class DateCountDown {
listeners: Map<string, Array<Function>>;
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);
on(eventName: string, listener: Function) {
this.listeners.get(eventName).push(listener);
}
startCountDown(date: Date) {
const thousand = 1000;
const sixty = 60;
const twentyfour = 24;
const timer = setInterval(() => {
const now = new Date().getTime();
const t = date.valueOf() - now;
const days = Math.floor(t / (thousand * sixty * sixty * twentyfour));
const hours = Math.floor((t % (thousand * sixty * sixty * twentyfour)) / (thousand * sixty * sixty));
const minutes = Math.floor((t % (thousand * sixty * sixty)) / (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.days = 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);
});
javascript typescript
asked 2 hours ago
ZoinkyZoinky
1112
$endgroup$
Just of the code is, you give it a date, it will start counting down how many days, hours, minutes and seconds left by emitting an event 'countDown' and once 0 is reached 'expired' event is emitted.
How can this code be improved?
class DateCountDown {
listeners: Map<string, Array<Function>>;
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);
on(eventName: string, listener: Function) {
this.listeners.get(eventName).push(listener);
}
startCountDown(date: Date) {
const thousand = 1000;
const sixty = 60;
const twentyfour = 24;
const timer = setInterval(() => {
const now = new Date().getTime();
const t = date.valueOf() - now;
const days = Math.floor(t / (thousand * sixty * sixty * twentyfour));
const hours = Math.floor((t % (thousand * sixty * sixty * twentyfour)) / (thousand * sixty * sixty));
const minutes = Math.floor((t % (thousand * sixty * sixty)) / (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.days = 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);
});
javascript typescript
javascript typescript
asked 2 hours ago
ZoinkyZoinky
1112
asked 2 hours ago
ZoinkyZoinky
1112
edited 2 hours ago
Zoinky
asked 2 hours ago
ZoinkyZoinky
1112
asked 2 hours ago
ZoinkyZoinky
1112
asked 2 hours ago
ZoinkyZoinky
1112
1112
add a comment |
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