use-light-switch

React hook for dark mode.

🌈 Features

• Typescript compatible
• 0 Dependencies
• Tiny ~0.4kB
• React Hooks

Installation

npm i use-light-switch

💻 Live Example

🤔 Motivation

There was no library that included typings 🤕

🚀 Quickstart

import React from 'react'
import ReactDOM from 'react-dom'
import { useModeSelector } from 'use-light-switch'

const App: React.FC = () => {
    const selected = useModeSelector({
        light: { color: 'green', name: 'Light' },
        dark: { color: 'red', name: 'Dark' },
        unset: { color: 'blue', name: 'Unset' },
    })

    return <div>
        <p>Try switching your dark mode in macOS or Windows</p>
        <div style={{
            padding: '1em 2em',
            backgroundColor: selected.color
        }}>
            {selected.name}
        </div>
    </div>
}

ReactDOM.render(<App />, window.document.getElementById('root'))

📒 Reference

useLightSwitch()

This is the most basic react hook. It returns one of 3 Modes

Example

import { Mode, useLightSwitch } from 'use-light-switch'


const Simple: React.FC = () => {
    const mode = useLightSwitch()

    if (mode === Mode.Dark) ...

    return ...
}

Mode

A simple enum. Possible values are:

• Mode.Light
• Mode.Dark
• Mode.Unset

Unset is returned when the user has no explicit preference. This is often the case with older or if it's simply unsupported.

useModeSelector(options)

This is a handy hook that reduces boilerplate. You pass values for the different modes and the hook will choose accordingly to what is currently selected. uses modeSelector under the hood.

Example

import { useModeSelector } from 'use-light-switch'

const WithSelector: React.FC = () => {

    const selected = useModeSelector({
        light: { color: 'green', name: 'Light' },
        dark: { color: 'red', name: 'Dark' },
        unset: { color: 'blue', name: 'Unset' },
    })

    return <div>
        <h3>Selector</h3>
        <div style={{
            padding: '1em 2em',
            backgroundColor: selected.color
        }}>
            {selected.name}
        </div>
    </div>
}

All parameters are optional and typesafe.

modeSelector(mode, options)

This is a simple functions that returns the matched option to the mode.

Example

import { Mode, modeSelector } from 'use-light-switch'

const selected = modeSelector(
    Mode.Dark,
    {
        light: { color: 'green', name: 'Light' },
        dark: { color: 'red', name: 'Dark' },
        unset: { color: 'blue', name: 'Unset' },
    }
)

selected.color  // red
selected.name  // Dark