Node.js can't create Blobs?

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!

Solution 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;

Solution 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;