vremel/dist/datetime/formatRfc7231.js

JavaScript date utility library for Temporal API

import { isInstant } from "../type-utils.js";
import { formatHmsIso } from "./_formatHmsIso.js";
import { getDayOfWeekAbbreviationFromNumber } from "./_getDayOfWeekAbbreviationFromNumber.js";
import { getMonthAbbreviationFromNumber } from "./_getMonthAbbreviationFromNumber.js";
import { padLeadingZeros } from "./_padLeadingZeros.js";
/**
 * Returns a string in RFC 7231's format which represents an exact time of given temporal object.
 * Units smaller than second are ignored (rounded down).
 *
 * @param dt temporal object which includes exact time info (`Instant` and `ZonedDateTime`)
 * @returns a string formatted according to RFC 7231
 */
export function formatRfc7231(dt) {
    // timeZone: 'UTC', calendar: 'iso8601'
    const zdt = (isInstant(dt) ? dt : dt.toInstant()).toZonedDateTimeISO("UTC");
    const dayOfWeek = getDayOfWeekAbbreviationFromNumber(zdt.dayOfWeek);
    const year = padLeadingZeros(zdt.year, 4);
    const day = padLeadingZeros(zdt.day, 2);
    const month = getMonthAbbreviationFromNumber(zdt.month);
    return `${dayOfWeek}, ${day} ${month} ${year} ${formatHmsIso(zdt.hour, zdt.minute, zdt.second)} GMT`;
}
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