Converting between strings and ArrayBuffers

Question

Is there a commonly accepted technique for efficiently converting JavaScript strings to ArrayBuffers and vice-versa? Specifically, I\'d like to be able to write the contents

Answer 1

I'd recommend NOT using deprecated APIs like BlobBuilder

BlobBuilder has long been deprecated by the Blob object. Compare the code in Dennis' answer — where BlobBuilder is used — with the code below:

function arrayBufferGen(str, cb) {

  var b = new Blob([str]);
  var f = new FileReader();

  f.onload = function(e) {
    cb(e.target.result);
  }

  f.readAsArrayBuffer(b);

}

Note how much cleaner and less bloated this is compared to the deprecated method... Yeah, this is definitely something to consider here.