🌐⌚ react-timezone-select

Another react timezone select component, I know.. However this one has a few key benefits!

While looking around for a good option, I had trouble finding a timezone select components which:

1. Adjusted the choices automatically with Daylight Savings Time (DST)
2. Didn't have a huge list of choices to scroll through when technically only 24 (ish) are necessary

Demo: ndom91.github.io/react-timezone-select

This demo is also available in the ./examples directory. Simply run pnpm dev in the root of the repository and the vite dev server will start, where you can then find the example app at localhost:3001.

🏗️ Installing

// react-select is an optional peer dependency, unnecessary if using the hook
npm install react-timezone-select react-select

🔭 Usage

import React, { useState } from 'react'
import ReactDOM from 'react-dom'
import TimezoneSelect, { type ITimezone } from 'react-timezone-select'

const App = () => {
  const [selectedTimezone, setSelectedTimezone] = useState<ITimezone>(
    Intl.DateTimeFormat().resolvedOptions().timeZone
  )

  return (
    <div className="App">
      <h2>react-timezone-select</h2>
      <blockquote>Please make a selection</blockquote>
      <div className="select-wrapper">
        <TimezoneSelect
          value={selectedTimezone}
          onChange={setSelectedTimezone}
        />
      </div>
      <h3>Output:</h3>
      <div
        style={{
          backgroundColor: '#ccc',
          padding: '20px',
          margin: '20px auto',
          borderRadius: '5px',
          maxWidth: '600px',
        }}
      >
        <pre
          style={{
            margin: '0 20px',
            fontWeight: 500,
            fontFamily: 'monospace',
          }}
        >
          {JSON.stringify(selectedTimezone, null, 2)}
        </pre>
      </div>
    </div>
  )
}

const rootElement = document.getElementById('root')
ReactDOM.render(<App />, rootElement)

🪙 Tips

👤 Default Users Timezone

If you'd like the user's own timezone to be set as the initially selected option on render, we can make use of the new Intl browser API by setting the default state value to Intl.DateTimeFormat().resolvedOptions().timeZone.

const [timezone, setTimezone] = useState(
  Intl.DateTimeFormat().resolvedOptions().timeZone
)

Thanks @ndrwksr

🕒 Custom Timezones

You can append custom choices of your own, or fully replace the listed timezone options.

The timezones prop takes a dictionary of timezones. Don't worry, we'll prepend the (GMT...) part, you just have to pass the city(s) or region(s) you want in your label.

import TimezoneSelect, { type ITimezone, allTimezones } from 'react-timezone-select'

const [selectedTimezone, setSelectedTimezone] = useState<ITimezone>('Europe/Berlin')

<TimezoneSelect
  value={selectedTimezone}
  onChange={setSelectedTimezone}
  timezones={{
    ...allTimezones,
    'America/Lima': 'Pittsburgh',
    'Europe/Berlin': 'Frankfurt',
  }}
/>

The above example will generate two additional choices in the select options, one with the label '(GMT-5:00) Pittsburgh' and another with '(GMT+1:00) Frankfurt'. You can omit spreading in the allTimezones object and then only your custom timezone options get rendered in the select component.

🕹️ Props

• value - string | Object - Initial/current Timezone.

'America/Juneau' | {
  value: 'America/Juneau'
  label: '(GMT-8:00) Alaska,
  abbrev: 'AHST',
  offset: -8,
  altName: 'Alaskan Standard Time'
}

• onBlur - () => void
• onChange - (timezone) => void
• labelStyle - 'original' | 'altName' | 'abbrev' | 'offsetHidden'
• displayValue - 'GMT' | 'UTC'
• timezones - Record<string,string>
• currentDatetime - Date | string - Set datetime used to calculate timezone values (alternative to current datetime)

timezones={{
  ...allTimezones,
  'America/Lima': 'Pittsburgh',
  'Europe/Berlin': 'Frankfurt',
}}

• Any other react-select props

🎨 Custom Select component

By default, react-timezone-select uses react-select as underlying select component. If you'd like to bring your own select component, you can use the useTimezoneSelect hook instead of the TimezoneSelect component to render the timezones using your self-provided select component.

import { useTimezoneSelect, allTimezones } from 'react-timezone-select'

const labelStyle = 'original'
const timezones = {
  ...allTimezones,
  'Europe/Berlin': 'Frankfurt'
}

const customSelect = () => {
  const { options, parseTimezone } = useTimezoneSelect({ labelStyle, timezones })

  return (
    <select onChange={e => onChange(parseTimezone(e.currentTarget.value))}>
      {options.map(option => (
        <option value={option.value}>{option.label}</option>
      ))}
    </select>
  )
}

🚧 Contributing

Pull requests are always welcome! Please stick to repo settings (prettier, eslint, etc.), and if adding new features, please consider adding test(s) and documentation where appropriate!

🙏 Thanks

• All Contributors
• Carlos Matallin
• spacetime
• react-select