QUOTA_EXCEEDED_ERR in Mobile Safari

By  on  

I've been working on an HTML5 application for the new Mozilla Marketplace, writing a tutorial along the way to help all of you create and promote your HTML5 web-powered app.  The HTML5 app uses localStorage to save basic search history, as well as other newer APIs.  While testing my application on my iPhone, I was seeing the following error:

localStorage.setItem("history", JSON.stringify(myObject));

The error caused my app to break, refreshing the page and rendering the app useless!  After a bit of research, I found that the reason for the error was that my Mobile Safari's Private Browsing was turned on.  You'd expect a silent error when this mode is one, but nope -- simply a bricked app.  Since there's no way to detect if the user's browser is in "Private Browsing" is turned on (feature detection still works), the best solution is to wrap localStorage setters in try {} / catch() {} blocks:

try {
	localStorage.setItem("history", JSON.stringify(myObject));
}
catch(e) {}

I'm not seeing a better solution at the moment.  Since there's now way to track Private Mode, and certain interactions break in this mode, using try {} / catch() {} blocks appears to be the best solution.

Recent Features

  • By
    7 Essential JavaScript Functions

    I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent.  Times have changed but there are still a few functions each developer should...

  • By
    How to Create a RetroPie on Raspberry Pi – Graphical Guide

    Today we get to play amazing games on our super powered game consoles, PCs, VR headsets, and even mobile devices.  While I enjoy playing new games these days, I do long for the retro gaming systems I had when I was a kid: the original Nintendo...

Incredible Demos

  • By
    Ana Tudor’s Favorite CodePen Demos

    Cocoon I love canvas, I love interactive demos and I don't think I have ever been more impressed by somebody's work than when I discovered what Tiffany Rayside has created on CodePen. So I had to start off with one of her interactive canvas pens, even though...

  • By
    CSS Columns

    One major gripe that we've always had about CSS is that creating layouts seems to be more difficult than it should be. We have, of course, adapted and mastered the techniques for creating layouts, but there's no shaking the feeling that there should be a...

Discussion

  1. Your site hit the nail on the head. I discovered the best VPN for Gaming at this site http://www.anonymousvpnsoftware.com

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!