GitHub
npm
expo-random
provides a native interface for creating strong random bytes. With Random
you can create values equivalent to Node.js core crypto.randomBytes
API. expo-random
also works with expo-standard-web-crypto
, which implements the W3C Crypto API for generating random bytes.
Android Device | Android Emulator | iOS Device | iOS Simulator | Web |
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npx expo install expo-random
If you're installing this in a bare React Native app, you should also follow these additional installation instructions.
import * as Random from 'expo-random';
Random.getRandomBytes(byteCount)
Name | Type | Description |
---|---|---|
byteCount | number | A number within the range from |
Generates completely random bytes using native implementations. The byteCount
property
is a number
indicating the number of bytes to generate in the form of a Uint8Array
.
Falls back to Math.random
during development to prevent issues with React Native Debugger.
Returns
Uint8Array
An array of random bytes with the same length as the byteCount
.
Random.getRandomBytesAsync(byteCount)
Name | Type | Description |
---|---|---|
byteCount | number | A number within the range from |
Generates completely random bytes using native implementations. The byteCount
property
is a number
indicating the number of bytes to generate in the form of a Uint8Array
.
Returns
Promise<Uint8Array>
A promise that fulfills with an array of random bytes with the same length as the byteCount
.