Based on ankitrohatgi/tarballjs.

• reading and writing
• UTF-8 support for filenames and contents

• Browser only, no support for NodeJS
• File name (including path) has to be less than 100 characters
• Maximum total file size seems to be limited to somewhere between 500MB to 1GB (exact limit is unknown)

// ESM
import { TarReader, TarWriter } from '@gera2ld/tarjs';
// UMD
const { TarReader, TarWriter } = window.tarball;

const reader = new TarReader();
const items = await reader.readFile(tarBlob);