File API
var file = document.getElementById('file-input').files[0];
console.log(file.name, file.size, file.type, file.lastModifiedDate);
var reader = new FileReader();
reader.onload = function(element){
// do something with file contents
console.log(element.target.result);
};
reader.onerror = function(error){
// display error message
console.log(error);
};
// read file
reader.readAsArrayBuffer(file) OR .readAsBinaryString(file); OR .readAsText(file, encoding); OR .readAsDataURL(file);