robnyman

// Getting a file through XMLHttpRequest as an arraybuffer and creating a Blob
var rhinoStorage = localStorage.getItem("rhino"),
    rhino = document.getElementById("rhino");
if (rhinoStorage) {
    // Reuse existing Data URL from localStorage
    rhino.setAttribute("src", rhinoStorage);
}
else {
    // Create XHR and FileReader objects
    var xhr = new XMLHttpRequest(),

robnyman

// Getting a file through XMLHttpRequest as an arraybuffer and creating a Blob
var rhinoStorage = localStorage.getItem("rhino"),
    rhino = document.getElementById("rhino");
if (rhinoStorage) {
    // Reuse existing Data URL from localStorage
    rhino.setAttribute("src", rhinoStorage);
}
else {
    // Create XHR, Blob and FileReader objects
    var xhr = new XMLHttpRequest(),

robnyman

(function () {
    // IndexedDB
    var indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.OIndexedDB || window.msIndexedDB,
        IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.OIDBTransaction || window.msIDBTransaction,
        dbVersion = 1.0;

    // Create/open database
    var request = indexedDB.open("elephantFiles", dbVersion),
        db,
        createObjectStore = function (dataBase) {

robnyman

// Get a reference to the image element
var elephant = document.getElementById("elephant");

// Take action when the image has loaded
elephant.addEventListener("load", function () {
    var imgCanvas = document.createElement("canvas"),
        imgContext = imgCanvas.getContext("2d");

    // Make sure canvas is as big as the picture
    imgCanvas.width = elephant.width;

robnyman

// IndexedDB
window.indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.OIndexedDB || window.msIndexedDB,
    IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.OIDBTransaction || window.msIDBTransaction,
    dbVersion = 1;

/* 
    Note: The recommended way to do this is assigning it to window.indexedDB,
    to avoid potential issues in the global scope when web browsers start 
    removing prefixes in their implementations.

robnyman

(function () {
    // IndexedDB
    var indexedDB = window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB || window.OIndexedDB || window.msIndexedDB,
        IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.OIDBTransaction || window.msIDBTransaction,
        dbVersion = 1.0;

    // Create/open database
    var request = indexedDB.open("elephantFiles", dbVersion),
        db,
        createObjectStore = function (dataBase) {

robnyman

(function () {
    var matchMediaSupported = document.querySelector("#matchmedia-supported"),
        width600 = document.querySelector("#width-600"),
        height500 = document.querySelector("#height-500"),
        portraitOrientation = document.querySelector("#portrait-orientation"),
        width600Check,
        height500Check,
        portraitOrientationCheck;

    if (window.matchMedia) {

robnyman

// 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) {

robnyman

// 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);

robnyman

html:-moz-full-screen {
    background: red;
}

html:-webkit-full-screen {
    background: red;
}

html:-ms-fullscreen {
    background: red;