
Implementing Lazy Loading Functionality in Uno WebAssembly Applications
No matter the purpose of your application or website, performance is essential to a great user experience. Slow loading apps and webpages will turn users away almost immediately. Fortunately, Lazy Loading is a technique used to optimize load time by only loading required content at first, and loading any remaining page content once the user needs it. In this article, Johnny guides us through the steps required to implement the Lazy Loading functionality for ListView and Gridview controls in Uno Platform WASM applications. Follow Along with the Demo Project Source Code Lazy Loading Lazy Loading or incremental loading is a strategy to delay the loading of objects until they are actually needed. This can help reducing resources used by the application and increase loading times for the item collection, because only parts of the data are loaded initially. ScrollView For my usecase the trigger for loading more items is a certain scrolling threshold in the ListView and GridView control. To get the current scroll position we need to somehow access the ScrollView within the ListViewBase which is the base class for ListView and GridView. We will use the VisualTreeHelper class to get information about nodes in the visual tree and get a reference to the inner ScrollView of the ListViewBase var myScrollView = ExtendedVisualTreeHelper.GetFirstDescendant(myGridView); myScrollView.ViewChanged +=