Can be set to show the results of a validation process.
You can provide an implementation of this method yourself, or use WinJS.Utilities.startLog to create one that logs to the JavaScript console.
The message to log.
The tag or tags to categorize the message (winjs, winjs controls, etc.).
The type of message (error, warning, info, etc.).
This method has been deprecated. Strict processing is always on; you don't have to call this method to turn it on.
Wraps calls to XMLHttpRequest in a promise.
The options that are applied to the XMLHttpRequest object, as follows: type, url, user, password, responseType, headers, data, customRequestInitializer.
A promise that returns the XMLHttpRequest object when it completes.