send base64 code from filereader to another file code example
Example: javascript base64 encode file input
var fileInput = document.getElementById('#myInputID');
var reader = new FileReader();
reader.readAsDataURL(fileInput.files[0]);
reader.onload = function () {
console.log(reader.result);//base64encoded string
};
reader.onerror = function (error) {
console.log('Error: ', error);
};