@craftzdog/react-native-buffer

The buffer module from node.js, for React Native.

Simply require('@craftzdog/react-native-buffer') or use the Buffer global and you will get this module. It internally uses react-native-quick-base64, which is a performant native implementation of base64.

The goal is to provide an API that is 100% identical to node's Buffer API. Read the official docs for the full list of properties, instance methods, and class methods that are supported.

install

1npm install @craftzdog/react-native-buffer react-native-quick-base64
2cd ios && pod install

usage

The module's API is identical to node's Buffer API. Read the official docs for the full list of properties, instance methods, and class methods that are supported.

To depend on this module explicitly, require it like this:

1import { Buffer } from "@craftzdog/react-native-buffer";

how does it work?

The Buffer constructor returns instances of Uint8Array that have their prototype changed to Buffer.prototype. Furthermore, Buffer is a subclass of Uint8Array, so the returned instances will have all the node Buffer methods and the Uint8Array methods. Square bracket notation works as expected -- it returns a single octet.

The Uint8Array prototype remains unmodified.

conversion packages

convert typed array to buffer

Use typedarray-to-buffer to convert any kind of typed array to a Buffer. Does not perform a copy, so it's super fast.

convert buffer to typed array

Buffer is a subclass of Uint8Array (which is a typed array). So there is no need to explicitly convert to typed array. Just use the buffer as a Uint8Array.

convert blob to buffer

Use blob-to-buffer to convert a Blob to a Buffer.

convert buffer to blob

To convert a Buffer to a Blob, use the Blob constructor:

1var blob = new Blob([buffer]);

Optionally, specify a mimetype:

1var blob = new Blob([buffer], { type: "text/html" });

convert arraybuffer to buffer

To convert an ArrayBuffer to a Buffer, use the Buffer.from function. Does not perform a copy, so it's super fast.

1var buffer = Buffer.from(arrayBuffer);

convert buffer to arraybuffer

To convert a Buffer to an ArrayBuffer, use the .buffer property (which is present on all Uint8Array objects):

1var arrayBuffer = buffer.buffer.slice(
2  buffer.byteOffset,
3  buffer.byteOffset + buffer.byteLength
4);

Alternatively, use the to-arraybuffer module.

performance

4x faster than base64-js on an iPhone 11 Pro when dealing with base64, thanks to react-native-quick-base64.

credit

This was originally forked from feross/buffer.

Security Policies and Procedures

The buffer team and community take all security bugs in buffer seriously. Please see our security policies and procedures document to learn how to report issues.

license

MIT. Copyright (C) Takuya Matsuyama, and other contributors. Originally forked from an MIT-licensed module by Feross Aboukhadijeh and Romain Beauxis.