Onyx for the Web Client is a Fling that translates actions taken in the vSphere Web Client to PowerCLI.Net code. This Fling was the winning entry in last year’s 2014 Fling Contest. It’s an update, of sorts, to the Onyx fling, as it allows for similar functionality in the web client.
The Onyx for the Web Client Fling provides the ability to record actions taken in the vSphere Web Client and turn these actions into PowerCLI.Net code. The resulting code can then be used to understand how VMware performs an action in the API and also better define functions. You could also input the resulting code into search engines to find the API documentation and information on how to use this area of the vSphere API.
Also see this article: Onyx for the Web Client