const compression = new CompressionStream("zstd");
const decompression = new DecompressionStream("zstd")

(async () => {
  const compression = async item => {
    const compression = new CompressionStream('zstd'), writer = compression.writable.getWriter();
    
    writer.write(item);
    writer.close();
    
    return await new Response(compression.readable).arrayBuffer();
  };

  const decompression = async compress => {
    const decompression = new DecompressionStream('zstd'), writer = decompression.writable.getWriter();
  
      writer.write(compress);
      writer.close();
      
      return await new Response(decompression.readable).arrayBuffer();
  };
	
  const text = 'this is text';
  const encoder = new TextEncoder;
  const compress = await compression(encoder.encode(text));
  
  console.log('compress = ', compress);
  
  const decompress = await decompression(compress);
  const decoder = new TextDecoder;
  
  console.log('decompress = ', decompress);
  console.log('text = ', decoder.decode(decompress));