Add promise never resolves

[Gouvernathor]

const zipFileStream = new TransformStream();

const zipWriter = new zipJS.ZipWriter(zipFileStream.writable);
await zipWriter.add("text.txt", new Blob(["Hello, world!"]).stream()); // <--
await zipWriter.close();

const zipFileBlob = await new Response(zipFileStream.readable).blob();

Here, the promise returned by the .add method never resolves.

[gildas-lormeau]

You have to start consuming the readable before writing the data because TransformStream is not a "pull-oriented" API. It's not a bug in zip.js. This is how TransformStream works.

const zipFileStream = new TransformStream();

const blobPromise = new Response(zipFileStream.readable).blob(); // <--

const zipWriter = new zipJS.ZipWriter(zipFileStream.writable);
await zipWriter.add("text.txt", new Blob(["Hello, world!"]).stream()); 
await zipWriter.close();

const zipFileBlob = await blobPromise;