FileReaderSync : Object

Similar to %%/FileReader|FileReader%% except synchronously reads from %%/Blob|Blob%%s.
Only available inside %%/Worker|Worker%%s.

Spec:
https://w3c.github.io/FileAPI/#FileReaderSync

----
new FileReaderSync() : FileReaderSync

Constructs a new FileReaderSync.

----
prototype.readAsArrayBuffer() : ArrayBuffer

Reads from **blob** as an ArrayBuffer. 
See also %%/Blob#arrayBuffer|Blob.arrayBuffer()%%.

<htmlexample>
<script id='code' type='text/plain'>
  const blob = new Blob(['foo']);
  const reader = new FileReaderSync();
  postMessage(reader.readAsArrayBuffer(blob));
</script>
<script>
  var code = document.getElementById('code').textContent;
  var blob = new Blob([code], { type: 'application/javascript' });
  var url = URL.createObjectURL(blob);
  var worker = new Worker(url);
  worker.onmessage = function(e) {
    console.log('worker returned: ', ...new Uint8Array(e.data));
  };
</script>
</htmlexample>

----
prototype.readAsText(blob : Blob, [encoding : String]) : String

Reads from **blob** as a string. 
For the valid values of **encoding**, see %%http://www.iana.org/assignments/character-sets/character-sets.xhtml|character sets%%.
See also %%/Blob#text|Blob.text()%%.

<htmlexample>
<script id='code' type='text/plain'>
  const blob = new Blob(['foo']);
  const reader = new FileReaderSync();
  postMessage(reader.readAsText(blob));
</script>
<script>
  var code = document.getElementById('code').textContent;
  var blob = new Blob([code], { type: 'application/javascript' });
  var url = URL.createObjectURL(blob);
  var worker = new Worker(url);
  worker.onmessage = function(e) {
    console.log('worker returned: ', e.data);
  };
</script>
</htmlexample>