Mobile App BorderlandVAT updated

Μειωμένο ΦΠΑ νησιώνMobile web app version, of the desktop BorderlandVAT, to calculate VAT differences on some Greek islands, updated to latest VAT changes and except of that goes full screen capable at mobile devices when you put it on home screen.

Also a list of these islands is accesible from the app’s interface.

For more info, downloads & updates you can see at the Mobile BorderlandVAT project’s home page.

BorderlandVAT (ΦΠΑ Νησιών) for Firefox OS

moz-icon-256A mobile version of the application BorderlandVAT.

Using edge mobile web standards, such as HTML5, jQuery Mobile etc., provide a smooth and rock-solid Touch-Optimized experience for all popular mobile device platforms. Also it use the webcache API, so it can run at offline mode with the full capabilities. For updates and more information see at the BorderlandVAT (ΦΠΑ Νησιών) homepage.

BorderlandVAT (ΦΠΑ Νησιών) is now available at the Firefox Marketplace for Firefox OS and Firefox for Android.

borderlandvat-firefox-marketplace-qrcodeYou can install the application from the Firefox Marketplace at the url
or by scanning the next QR Code


Book review: “Instant HTML5 Local Storage how-to”

local-storage-bookBefore some days, Packt Publishing, published a new book titled “Instant HTML5 Local Storage how-to”, by Alex Libby. It’s a very well and clear written book, which provides an easy to understand introduction to the LocalStorage technology.

Each chapter deals with a new receipt and moves the reader step by step deeper to this HTML5 feature understanding.

Clarifies the difference between LocalStorage and SessionStorage, and make a comparison between the old fashioned cookies and this fresh approach.

Recipes not stands to pure JS usage of LocalStorage but combining it with the popular jQuery, Modernizr and other useful libraries and techniques, such as store.js, cache manifest etc., which make the LocalStorage usage more easy, very powerful and bypassing a lot of problems. Also learn you how to use JSON to store objects, arrays, TTL and images in LocalStorage.

Except of all these, considered the use of LocalStorage in the mobile field, at offline web applications usage and with well-targeted examples for LocalStorage integration in CMS and forms.

Summarize all these, “Instant HTML5 Local Storage how-to”, is nice a book for web developers with HTML and JavaScript knowledge, who wants a fast track, based on practical examples, introduction to the LocalStorage technology.

HTML5 localStorage exploit at Chrome, Safari, Opera & IE

html5-local-storageCurrent versions of Chrome, Safari, Opera and IE they implement HTML5 localStorage quite unsophisticated, ignoring the affiliated sites (and subdomains) storage limit as provided by the specification. So, by setup perpetually subdomains exploiting this weakness, and with some tricky code, a site can fill up completely the user’s hard disk space., create proof-of-concept web site, the and make the code they used available at the GitHub, also with submitting bug reports to all exploitable browsers dev teams.

This exploit can affect systems with Chrome 25, Safari 6, Opera 12 & IE 10 and prior versions of these browsers with localStorage feature.

The only bullet-proof major browser is the Firefox, because of smarter and more in line with the standards implementation, of the localStorage feature.