Package Exports

react-native-image-colors
react-native-image-colors/build/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (react-native-image-colors) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

react-native-image-colors

Publish size

Fetch prominent colors from an image.

Example 1 Demo 1 Android Demo 1 iOS Demo 2 Android Demo 2 iOS

This module is a wrapper around the Palette class on Android, UIImageColors on iOS and node-vibrant for the web.

Installation

npm install react-native-image-colors

yarn add react-native-image-colors

Expo

react-native-image-colors requires Expo SDK 47+

Please ensure that your app has at least iOS 13 as a deployment target, which is required for react-native-image-colors as well as Expo SDK 47+

Build custom native code

expo prebuild

# iOS
expo run:ios

# Android
expo run:android

The example is an expo app.

Android

Rebuild the app.

iOS

Install the pod, then rebuild the app.

npx pod-install

Web

You're good to go!

Usage

import ImageColors from 'react-native-image-colors'

const uri = require('./cool.jpg')

const result = await ImageColors.getColors(uri, {
  fallback: '#228B22',
  cache: true,
  key: 'unique_key',
})

switch (result.platform) {
  case 'android':
    // android result properties
    const vibrantColor = result.vibrant
    break
  case 'web':
    // web result properties
    const lightVibrantColor = result.lightVibrant
    break
  case 'ios':
    // iOS result properties
    const primaryColor = result.primary
    break
  default:
    throw new Error('Unexpected platform key')
}

API

`ImageColors.getColors(uri: string, config?: Config): Promise<ImageColorsResult>`

`uri`

A string which can be:

URL:

https://i.imgur.com/O3XSdU7.jpg

Local file:

const catImg = require('./images/cat.jpg')

Base64:
```
const catImgBase64 = 'data:image/jpeg;base64,/9j/4Ri...'
```
The mime type prefix for base64 is required (e.g. data:image/png;base64).

`Config`

Property	Description	Type	Required	Default	Supported platforms
`fallback`	If a color property couldn't be retrieved, it will default to this hex color string (note: do not use shorthand hex. e.g. `#fff`).	`string`	No	`"#000000"`	All
`cache`	Enables in-memory caching of the result - skip downloading the same image next time.	`boolean`	No	`false`	All
`key`	Unique key to use for the cache entry. The image URI is used as the unique key by default. You should explicitly pass a key if you enable caching and you're using a base64 string as the URI.	`string`	No	`undefined`	All
`headers`	HTTP headers to be sent along with the GET request to download the image	`Record<string, string>`	No	`undefined`	iOS, Android
`pixelSpacing`	How many pixels to skip when iterating over image pixels. Higher means better performance (note: value cannot be lower than 1).	`number`	No	`5`	Android
`quality`	Highest implies no downscaling and very good colors.	`'lowest'` `'low'` `'high'` `'highest'`	No	`"low"`	iOS, Web

`ImageColorsResult`

Every result object contains a respective platform key to help narrow down the type.

`AndroidImageColors`

Property	Type
`dominant`	`string`
`average`	`string`
`vibrant`	`string`
`darkVibrant`	`string`
`lightVibrant`	`string`
`darkMuted`	`string`
`lightMuted`	`string`
`muted`	`string`
`platform`	`"android"`

`WebImageColors`

Property	Type
`dominant`	`string`
`vibrant`	`string`
`darkVibrant`	`string`
`lightVibrant`	`string`
`darkMuted`	`string`
`lightMuted`	`string`
`muted`	`string`
`platform`	`"web"`

`IOSImageColors`

Property	Type
`background`	`string`
`primary`	`string`
`secondary`	`string`
`detail`	`string`
`platform`	`"ios"`

Notes

There is an example app.
Since the implementation of each platform is different you can get different color results for each.