get-moment-stamp/build/index.mjs

The getMomentStamp() function returns number of days since 01/01/1970 independent from the current time zone

/*export const toLondonDate_obsolete = (date = new Date()): Date => {
    return new Date(date.getTime() + date.getTimezoneOffset() * 60000);
};*/
const toLondonDate = (date = new Date()) => {
    const londonTimeZone = 'Europe/London';
    return new Date(date.toLocaleString('en-US', { timeZone: londonTimeZone }));
};
const GENESIS_STAMP = toLondonDate(new Date(0));
const DIMENSION_DELTA = 1000 * 60 * 60 * 24;
const getMomentStamp = (date = new Date()) => {
    const currentStamp = toLondonDate(date);
    const differenceMs = Math.abs(currentStamp.getTime() - GENESIS_STAMP.getTime());
    return Math.floor(differenceMs / DIMENSION_DELTA);
};
const getTimeStamp = (date = new Date()) => {
    const hour = date.getHours();
    const minute = date.getMinutes();
    return hour * 60 + minute;
};
const isCurrentTime = (timeStamp, delta = 15) => {
    const currentStamp = getTimeStamp();
    const min = currentStamp - delta;
    const max = currentStamp + delta;
    return timeStamp >= min && timeStamp <= max;
};
const isCurrentDate = (date, stamp = getMomentStamp()) => {
    return getMomentStamp(date) === stamp;
};
const fromMomentStamp = (momentStamp) => {
    const millisecondsSinceGenesis = momentStamp * DIMENSION_DELTA;
    const londonDate = new Date(GENESIS_STAMP.getTime() + millisecondsSinceGenesis);
    return new Date(londonDate.getTime() - londonDate.getTimezoneOffset() * 60000);
};
const fromTimeStamp = (timeStamp, baseDate = new Date()) => {
    const hours = Math.floor(timeStamp / 60);
    const minutes = timeStamp % 60;
    const resultDate = new Date(baseDate);
    resultDate.setHours(hours, minutes, 0, 0);
    return resultDate;
};
const fromTimeStampWithMoment = (timeStamp, momentStamp = getMomentStamp()) => {
    const baseDate = fromMomentStamp(momentStamp);
    const hours = Math.floor(timeStamp / 60);
    const minutes = timeStamp % 60;
    baseDate.setHours(hours, minutes, 0, 0);
    return baseDate;
};

export { fromMomentStamp, fromTimeStamp, fromTimeStampWithMoment, getMomentStamp, getTimeStamp, isCurrentDate, isCurrentTime, toLondonDate };