3 A [ponyfill](https://ponyfill.com) for `Buffer.from`, uses native implementation if available.
8 npm install --save buffer-from
14 const bufferFrom = require('buffer-from')
16 console.log(bufferFrom([1, 2, 3, 4]))
17 //=> <Buffer 01 02 03 04>
19 const arr = new Uint8Array([1, 2, 3, 4])
20 console.log(bufferFrom(arr.buffer, 1, 2))
23 console.log(bufferFrom('test', 'utf8'))
24 //=> <Buffer 74 65 73 74>
26 const buf = bufferFrom('test')
27 console.log(bufferFrom(buf))
28 //=> <Buffer 74 65 73 74>
35 - `array` <Array>
37 Allocates a new `Buffer` using an `array` of octets.
39 ### bufferFrom(arrayBuffer[, byteOffset[, length]])
41 - `arrayBuffer` <ArrayBuffer> The `.buffer` property of a TypedArray or ArrayBuffer
42 - `byteOffset` <Integer> Where to start copying from `arrayBuffer`. **Default:** `0`
43 - `length` <Integer> How many bytes to copy from `arrayBuffer`. **Default:** `arrayBuffer.length - byteOffset`
45 When passed a reference to the `.buffer` property of a TypedArray instance, the
46 newly created `Buffer` will share the same allocated memory as the TypedArray.
48 The optional `byteOffset` and `length` arguments specify a memory range within
49 the `arrayBuffer` that will be shared by the `Buffer`.
51 ### bufferFrom(buffer)
53 - `buffer` <Buffer> An existing `Buffer` to copy data from
55 Copies the passed `buffer` data onto a new `Buffer` instance.
57 ### bufferFrom(string[, encoding])
59 - `string` <String> A string to encode.
60 - `encoding` <String> The encoding of `string`. **Default:** `'utf8'`
62 Creates a new `Buffer` containing the given JavaScript string `string`. If
63 provided, the `encoding` parameter identifies the character encoding of
68 - [buffer-alloc](https://github.com/LinusU/buffer-alloc) A ponyfill for `Buffer.alloc`
69 - [buffer-alloc-unsafe](https://github.com/LinusU/buffer-alloc-unsafe) A ponyfill for `Buffer.allocUnsafe`