Angular 17.3.0 xlsx audio buffer

Resolves "Buffer is not constructor" error in Angular 17 and demonstrates correct Buffer polyfill setup in a minimal working example.

When working with Buffer in Angular 17, you might encounter the error:

Buffer is not constructor
var global = global || window;
var Buffer = Buffer || [];

1. Install dependencies

pnpm rm xlsx
pnpm buffer 
pnpm install --save https://cdn.sheetjs.com/xlsx-0.20.3/xlsx-0.20.3.tgz

2. Create/update polyfills.ts

import { Buffer } from 'buffer';
(window as any).Buffer = Buffer;

Running the Demo

• Don't set up Buffer in index.html
• Don't use new Buffer() (deprecated)

What This Demo Includes

• Proper Buffer polyfill setup
• Binary data handling example
• File processing with SheetJS
• Working audio file metadata extraction