Javascript: How to get 2020-05-15T05:00:00Z format date string?

Question

I have a date object in javascript and I'm trying to get it to return a string in that format.

private convertEpochToDate(epoch: string) {
    var d = new Date(0); // The 0 there is the key, which sets the date to the epoch
    if (!epoch) return "nodate";
    var date = new Date(0);
    let milliseconds = parseInt(epoch);
    date.setUTCMilliseconds(milliseconds);

    return date;
}

Instead of the date object, I need the date to be formatted in the string just like this: 2020-05-15T05:00:00Z

Answer 1

Just take Date#toISOString .

 console.log(new Date().toISOString());

Answer 2

convertEpochToDate(epochTime: number), says it's mandatory. so you do not require

if (!epoch) return "nodate";

convertEpochToDate(epochTime?: number), now it's optional

if (!epoch) return "nodate";

or,

const epochString = !!date ? this.convertEpochToDate(date) : "no date";

(epochTime: number) since you are expecting date in milliseconds-which'd be a number- eg: new Date().getTime();

private convertEpochToDate(epochTime: number): string => new Date(epochTime).toISOString();

(epochTime: Date) if you are passing as a date object. mind it's "Date", not "date".

 private convertEpochToDate(epochTime: Date): string => epochTime.toISOString();

Answer 3

You should check out the moment.js library which has every kind of date functionality you would ever want.