@rjsf/utils/lib/utcToLocal.js

Utility functions for @rjsf/core

import pad from './pad.js';
/** Converts a UTC date string into a local Date format
 *
 * @param jsonDate - A UTC date string
 * @returns - An empty string when `jsonDate` is falsey, otherwise a date string in local format
 */
export default function utcToLocal(jsonDate) {
    if (!jsonDate) {
        return '';
    }
    // required format of `'yyyy-MM-ddThh:mm' followed by optional ':ss' or ':ss.SSS'
    // https://html.spec.whatwg.org/multipage/input.html#local-date-and-time-state-(type%3Ddatetime-local)
    // > should be a _valid local date and time string_ (not GMT)
    // Note - date constructor passed local ISO-8601 does not correctly
    // change time to UTC in node pre-8
    const date = new Date(jsonDate);
    const yyyy = pad(date.getFullYear(), 4);
    const MM = pad(date.getMonth() + 1, 2);
    const dd = pad(date.getDate(), 2);
    const hh = pad(date.getHours(), 2);
    const mm = pad(date.getMinutes(), 2);
    const ss = pad(date.getSeconds(), 2);
    const SSS = pad(date.getMilliseconds(), 3);
    return `${yyyy}-${MM}-${dd}T${hh}:${mm}:${ss}.${SSS}`;
}
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