Polyfills

Recommended: JavaScript SDK for React Native

While this SDK is still supported, we recommend using newer JavaScript SDK, which is optimized for React Native, but also comes with a host of other benefits.

Your React Native project might require polyfills for certain global objects. The requirements differ based on your Expo SDK version.

Expo SDK 54 and above have built-in support for most polyfills.Expo SDK 53 and below require additional polyfills as described in the sections below.

For Expo SDK 54 and Above

Installation

npm install @react-native-anywhere/polyfill-base64

Include the following code in your project’s entry point:

import '@react-native-anywhere/polyfill-base64';

For Expo SDK 53 and Below

Installation

npm install text-encoding react-native-get-random-values buffer @react-native-anywhere/polyfill-base64

Include the following code in your project’s entry point to set up the polyfills:

import 'react-native-get-random-values';
import '@react-native-anywhere/polyfill-base64';
import { Buffer } from 'buffer';

// Polyfill for @dynamic-labs/solana-extension
global.TextEncoder = require('text-encoding').TextEncoder;
global.Buffer = Buffer;

Additional Requirements

If you’re using ZeroDev, also please refer to the ZeroDev polyfills section.

Last modified on July 24, 2026

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React Native SDK Reference

Recommended: JavaScript SDK for React Native

For Expo SDK 54 and Above

For Expo SDK 53 and Below

Additional Requirements

Recommended: JavaScript SDK for React Native

​For Expo SDK 54 and Above

​For Expo SDK 53 and Below

​Additional Requirements

For Expo SDK 54 and Above

For Expo SDK 53 and Below

Additional Requirements