@vvo/tzdb/dist/formatTimeZone.js

Always up to date list of time zones, with grouping and major cities

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = format;

function format({
  alternativeName,
  mainCities,
  rawOffsetInMinutes,
  currentTimeOffsetInMinutes
}, {
  useCurrentOffset = false
} = {}) {
  const offsetInHours = useCurrentOffset ? getOffsetString(currentTimeOffsetInMinutes) : getOffsetString(rawOffsetInMinutes);
  return `${offsetInHours.padStart(6, "+")} ${alternativeName} - ${mainCities.join(", ")}`;
}

function getOffsetString(offsetInMinutes) {
  const absOffsetInMinutes = Math.abs(offsetInMinutes);
  const [hours, minutes] = [Math.floor(absOffsetInMinutes / 60), absOffsetInMinutes % 60].map(v => {
    return v.toString().padStart(2, "0");
  });
  const durationInHoursMinutes = `${hours}:${minutes}`;
  return `${offsetInMinutes >= 0 ? "+" : "-"}${durationInHoursMinutes}`;
}
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