TypeError: Read error for undefined : buffer[bufferReader] is not a function

[Plagiatus]

I'm getting the above issue when trying to include prismarine-nbt in a svelte / vite frontend web project.

My relevant code snippet:

import * as nbt from "prismarine-nbt";

export async function readNBTFile(file: File) {
    const buffer = await file.arrayBuffer();
    console.log(buffer);
    const { parsed, type } = await nbt.parse(buffer); // <- error happens here
    console.log({ parsed, type });
}

using the same code (but with callbacks instead of async/await) it works fine with nbt.js, however it's a no longer maintained project so I'd very much prefer to use this one instead.

[extremeheat]

You need to pass a Node.js Buffer, not an ArrayBuffer

[Plagiatus]

I was afraid something like that would be the case. This unfortunately makes using it purely on the frontend very inconvenient.

Thanks anyways.

[extremeheat]

If you want to use prismarine-nbt (a nodejs library) on the web you will need to transpile to something browser compatible as with any other Node.js library.

Tool like browserify or webpack can do this. Those will implement the Node.js Buffer object that you can then instantiate to pass into prismarine-nbt. We also have a section on this in the readme https://github.com/PrismarineJS/prismarine-nbt?tab=readme-ov-file#browser-usage

[extremeheat]

Since this has been brung up a few times (eg #56), we could do some sanity check before and maybe some conversion inside parse (Blob/ArrayBuffer => Node.js Buffer) to handle some of the handleable user mistakes