MaxWright

// Create XHR
var xhr = new XMLHttpRequest(),
    blob;

xhr.open("GET", "elephant.png", true);
// Set the responseType to blob
xhr.responseType = "blob";

xhr.addEventListener("load", function () {
    if (xhr.status === 200) {

MaxWright

// Retrieve the file that was just stored
transaction.objectStore("elephants").get("image").onsuccess = function (event) {
    var imgFile = event.target.result;
    console.log("Got elephant!" + imgFile);

    // Get window.URL object
    var URL = window.URL || window.webkitURL;

    // Create and revoke ObjectURL
    var imgURL = URL.createObjectURL(imgFile);