Windows® 8.1 Apps with HTML5 and JavaScript Unleashed

Performing Validation

In Chapter 5, “Creating Forms,” I explained how you can use HTML5 validation attributes to validate form data submitted in a Windows Store app. However, it is important to realize that any validation performed in a Windows Store app can always be bypassed when calling a remote Mobile Service. A user can interact directly with the remote service and submit any data that you can imagine.

If you want to validate the data submitted to a Mobile Service then you should create delete.js, insert.js, read.js, or update.js scripts that execute on Azure when a Mobile Service is invoked. It is worth emphasizing that these scripts execute on the Azure server (in one of Microsoft’s data centers) and not within a Windows Store app. Because ...