The Mermaid library is a large beast, and if you're using it selectively in your Web content you probably want to make sure you don't load it unless you actually need it, due to it's download footprint and load time. If you're loading Mermaid with server only code it's pretty straight forward, but if you use it on the client there you may want to delay loading the library until you actually need to display a diagram.

WebBrowser loading is always async and the WebView2 control is no different - in fact it's more complex as there a number of events that need to be handled in order to properly handle loading the control. In this post I describe how you can create a simplified load checking routine, or use the Westwind.WebView library and WebViewHandler to wait on content and process document access using linear `await` syntax.