In most cases, you can follow common web application techniques to allow app content to be resizeable in desktop devices, such as using percentages for dimensions and setting the CSS overflow property. Depending on the app’s content, it is typically a good practice to add the following CSS properties to the root element for your custom app content:

In many cases, this is all that is required to allow custom app content to properly handle desktop dimension changes when the container is resized. If custom handling is required, however, you can explicitly Handle Resize Events in custom apps.