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Windows 8 & JavaScript
This document discusses building Windows 8 applications using JavaScript. Some key points: - Windows 8 is coming and will focus on the consumerization of IT and support for tablets and ARM processors. - JavaScript and HTML5 will be first-class options for developing "Metro apps" for Windows 8, alongside the new Windows Runtime API. - Metro apps can be distributed through the Windows Marketplace and take advantage of features like cross-device support and integration with services like Xbox and Windows Live.
Windows 8 & JavaScript
- 1. Building Windows 8applications with JavaScript JavaScript by Robert MacLean
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- 5. Metro Design vs.Metro Apps
- 6. Why a MetroApp?
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- 11. Your tools &knowledge
- 12. Summary Windows 8 iscoming Modern way for users to work, modern way for developers to build JavaScript & HTML 5 is FIRST CLASS Questions?
- 13. Contact Details Robert MacLean robert@sadev.co.za 073142 5422 @rmaclean http://www.sadev.co.za
- 14. Out this year 100 000 new & improved features Big focuses on the future Consumerisation of IT Tablets ARM support New development options and tools
- 15. Metro Metro design &“Metro apps” are different Design matters Common language for design Common UX for Microsoft Xbox Windows Windows Phone Not going to be covered in this talk
- 16. Benefits of MetroApps Trust Sandboxed User is in control Opt-in for features Take advantage of Windows RT features Cross CPU support Backed by the cloud Easy for users to get, install and migrate apps Marketplace Windows Live
- 17. Browsers in Windows8 Internet Explorer 10 Metro App & Traditional Desktop Application Metro is plug in free Expect it to be better than IE 9, in every way Microsoft has a new model for development Firefox & Chrome Metro App & Traditional Desktop Application Mozilla & Google getting special permissions & working with Microsoft
- 18. Hardware Accelerated inIE 9 & IE 10
- 19. Marketplace App store, likeany other Process Submission Testing & Approval by Microsoft Profit Free Adverts Trials (limited time & limited features) In App Purchases
- 20. Windows Runtime (WinRT) Win32API is twenty years old Different world & different devices WinRT built from ground up Modern thinking, “stolen” from best of breed Mobile Async .NET & Java All languages are first class
- 21. WinJS Project the WindowsRuntime into JavaScript WinJS – implemented as Core library UI library Resource libraries Style sheets Not portable, even to Windows 8 browsers Projectable to Windows Metadata Can be consumed in other languages
- 22. Your favourite libraries Thisis real JavaScript Your patterns move across Your libraries move across Be careful of cross domain checks Some additional security See hidden slides
- 23. jQuery, XHR andlocal context • jQuery xhr does a cross-domain check (in > v1.6) – In local context, your origin is “ms- wwa://{something}” – Cross domain check fails • Workarounds – Use WinJS XHR – Tell jQuery to bypass the check • $.support.cors = true; • http://api.jquery.com/jQuery.support/
- 24. Host Enforcement • Preventspotentially “bad” HTML from getting inserted – Script blocks, iframes, event handlers, etc. • Kicks in when setting strings – innerHTML – outerHTML – setAdjacentHTML • “data-” attributes in general not on the allowed list – WinJS specific ones are ok
- 25. Host Enforcement EscapeHatches • Can work around when needed: – toStaticHTML method – Use DOM creation APIs – Use WinJS.Utilities.setInnerHTMLUnsafe – Use msWWA.execUnsafeLocalFunction