Strip EXIF from metadata from image file

stripexif.js

// https://stackoverflow.com/questions/27638402/strip-exif-data-from-image
// includes fiddle

function removeExif(res, cb) {
	const dv = new DataView(res);
	let offset = 0;
	let recess = 0;
	const pieces = [];
	let i = 0;

	if (dv.getUint16(offset) == 0xffd8) {
		offset += 2;
		let app1 = dv.getUint16(offset);
		offset += 2;

		while (offset < dv.byteLength) {
			if (app1 == 0xffe1) {
				pieces[i] = { recess, offset: offset - 2 };
				recess = offset + dv.getUint16(offset);
				i++;
      }
			else if (app1 == 0xffda) {
				break;
			}
			offset += dv.getUint16(offset);
			let app1 = dv.getUint16(offset);
			offset += 2;
		}

		if (pieces.length > 0){
    	var newPieces = [];
      pieces.forEach(function(v){
      	newPieces.push(res.slice(v.recess, v.offset));
      });
      newPieces.push(res.slice(recess));
      var br = new Blob(newPieces, {type: 'image/jpeg'});

			cb(br);
		}
	}
}

function StripExifFromFile(file, cb) {
	const fr = new FileReader();
	fr.onload = e => {
		removeExif(e.target.result, cb);
	};
	fr.readAsArrayBuffer(file);
}

// main fn call
StripExifFromFile(file, blob => {
	const data = new FormData();
	data.append('file', blob);

  // pass data to AJAX lib
};