wasm_gz 0.7.0

esm modules for gzip compression and/or decompression, with sync and async (worker) versions
Documentation 
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Zopfli on a file</title>
<style>
*{margin:0;padding:0;box-sizing:border-box}
html{height:100%;font:4vmin monospace;background:#222;color:#eee}
body{min-height:100%;padding:1rem;display:grid;place-items:center}
main{display:flex;flex-direction:column}
main>div{height:2rem}
.ok{color:green}
.ko{color:red}
</style>
</head>
<body>
<main>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</main>
</body>
<script type="module">
const encMod=import('./zopfli_enc.mjs');
const decMod=import('./gunzip.mjs');
const divs=[...document.querySelectorAll('main>div')];
divs[0].textContent='Fetching data...';
const original=new Uint8Array(await(await fetch('./zopfli.wasm')).arrayBuffer());
divs[0].textContent+=`done (${original.byteLength})`;
divs[1].textContent='Initializing compressor...';
const {zopfli}=await encMod;
const {gunzip}=await decMod;
divs[1].textContent+='done';
divs[2].textContent='Compressing...';
const compressed=await zopfli(original);
divs[2].textContent+=`done (${compressed.byteLength} B)`;
divs[3].textContent='Decompressing...';
const decompressed=await gunzip(compressed);
divs[3].textContent+=`done (${decompressed.byteLength} B)`;
divs[4].textContent='Comparing...';
const len=decompressed.byteLength;
let same=len===original.byteLength;
if(same){
  for(let i=0;i<len;++i){
    if(decompressed[i]!==original[i]){
      console.log(i);
      same=false;
      break;
    }
  }
}
divs[4].innerHTML+=same?'<span class="ok">identical</span>':'<span class="ko">not identical</span>';
</script>
</html>