@wordpress/components/build-module/date-time/time/timezone.js

UI components for WordPress.

import { createElement } from "@wordpress/element";

/**
 * WordPress dependencies
 */
import { __ } from '@wordpress/i18n';
import { getSettings as getDateSettings } from '@wordpress/date';
/**
 * Internal dependencies
 */

import Tooltip from '../../tooltip';
import { TimeZone as StyledComponent } from './styles';
/**
 * Displays timezone information when user timezone is different from site
 * timezone.
 */

const TimeZone = () => {
  const {
    timezone
  } = getDateSettings(); // Convert timezone offset to hours.

  const userTimezoneOffset = -1 * (new Date().getTimezoneOffset() / 60); // System timezone and user timezone match, nothing needed.
  // Compare as numbers because it comes over as string.

  if (Number(timezone.offset) === userTimezoneOffset) {
    return null;
  }

  const offsetSymbol = Number(timezone.offset) >= 0 ? '+' : '';
  const zoneAbbr = '' !== timezone.abbr && isNaN(Number(timezone.abbr)) ? timezone.abbr : `UTC${offsetSymbol}${timezone.offset}`;
  const timezoneDetail = 'UTC' === timezone.string ? __('Coordinated Universal Time') : `(${zoneAbbr}) ${timezone.string.replace('_', ' ')}`;
  return createElement(Tooltip, {
    position: "top center",
    text: timezoneDetail
  }, createElement(StyledComponent, {
    className: "components-datetime__timezone"
  }, zoneAbbr));
};

export default TimeZone;
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