@burglekitt/gmt/dist/plain/parse/parseNanosecondFromDateTime.js

Temporal-based date and time utilities with timezone support and polyfill integration

import { Temporal } from "@js-temporal/polyfill";
import { isValidDateTime } from "../validate/index.js";
/**
 * Return the nanosecond (0-999) for a given ISO 8601 datetime string.
 *
 * - Returns zero-padded string for nanosecond.
 * - Returns "" for invalid input.
 *
 * @param value ISO datetime string
 * @returns Nanosecond (000-999) or "" on invalid input
 *
 * @example parseNanosecondFromDateTime("2024-03-15T14:30:45.123") // "123"
 * @example parseNanosecondFromDateTime("2024-03-15T14:30:45.000") // "000"
 * @example parseNanosecondFromDateTime("invalid") // ""
 */
export function parseNanosecondFromDateTime(value) {
    if (!isValidDateTime(value))
        return "";
    try {
        const dateTime = Temporal.PlainDateTime.from(value);
        return dateTime.nanosecond.toString().padStart(3, "0");
    }
    catch {
        return "";
    }
}