Node.js can't create Blobs?

Question

I am working with node.js and I streamed my Audio to my node.js server. Now I noticed during the process of building the audio blob:

var audioBlob = new Blob([dataview], { type: 'audio/wav' }); 

That I get a ReferenceError at new Blob. It seems that Blob is not supported. How can I create a blob which I would like to save with node.js fs module.

Thanks guys!

Answer 1

The Solution to this problem is to create a function which can convert between Array Buffers and Node Buffers. :)

Convert a binary NodeJS Buffer to JavaScript ArrayBuffer

In recent node versions it's just:

let buffer = Buffer.from(arraybuffer); let arraybuffer = Uint8Array.from(buffer).buffer; 

Answer 2

Since Node.js 16, Blob can be imported:

import {Blob} from 'node:buffer';  new Blob([]); //=> Blob {size: 0, type: ''} 

Otherwise, just use cross-blob:

import Blob from 'cross-blob';   new Blob([]); //=> Blob {size: 0, type: ''}   // Global patch (to support external modules like is-blob). globalThis.Blob = Blob;