Represents a ZipWriter instance used to create a zip file.

Example:

// use a BlobWriter to store with a ZipWriter the zip into a Blob object
const blobWriter = new zip.BlobWriter("application/zip");
const writer = new zip.ZipWriter(blobWriter);

// use a TextReader to read the String to add
await writer.add("filename.txt", new zip.TextReader("test!"));

// close the ZipReader
await writer.close();

// get the zip file as a Blob
const blob = blobWriter.getData();