Buffer in nodejs

Buffer objects are used to represent a fixed-length sequence of bytes.

Pure JavaScript is Unicode friendly, but it is not so for binary data. While dealing with TCP streams or the file system, it’s necessary to handle octet streams. Node provides Buffer class which provides instances to store raw data similar to an array of integers but corresponds to a raw memory allocation outside the V8 heap.

Buffer class is a global class that can be accessed in an application without importing the buffer module.

var buf = new Buffer(10);
var buf = new Buffer([10, 20, 30, 40, 50]);