A ponyfill for Buffer.from, uses native implementation if available.

npm install --save buffer-from

constbufferFrom=require('buffer-from')console.log(bufferFrom([1,2,3,4]))//=> <Buffer 01 02 03 04>constarr=newUint8Array([1,2,3,4])console.log(bufferFrom(arr.buffer,1,2))//=> <Buffer 02 03>console.log(bufferFrom('test','utf8'))//=> <Buffer 74 65 73 74>constbuf=bufferFrom('test')console.log(bufferFrom(buf))//=> <Buffer 74 65 73 74>

• array <Array>

Allocates a new Buffer using an array of octets.

• arrayBuffer <ArrayBuffer> The .buffer property of a TypedArray or ArrayBuffer
• byteOffset <Integer> Where to start copying from arrayBuffer. Default:0
• length <Integer> How many bytes to copy from arrayBuffer. Default:arrayBuffer.length - byteOffset

When passed a reference to the .buffer property of a TypedArray instance, the newly created Buffer will share the same allocated memory as the TypedArray.

The optional byteOffset and length arguments specify a memory range within the arrayBuffer that will be shared by the Buffer.

• buffer <Buffer> An existing Buffer to copy data from

Copies the passed buffer data onto a new Buffer instance.

• string <String> A string to encode.
• encoding <String> The encoding of string. Default:'utf8'

Creates a new Buffer containing the given JavaScript string string. If provided, the encoding parameter identifies the character encoding of string.

• buffer-alloc A ponyfill for Buffer.alloc
• buffer-alloc-unsafe A ponyfill for Buffer.allocUnsafe