Version 1.5 of ArcGIS Experience Builder developer edition is now available on the developers website. In addition to the enhancements from the June update of the online edition, it provides guidelines and samples on how to use the assets like images and videos, write unit testing, and use extension points to initialize the third-party libraries when the app starts or to modify the app config at runtime. You can also search the API reference. See theblogfor details.
In the AGOL April update, a new feature was added:
A web experience can now communicate with an embedded app by passing URL parameters to control what appears in the embedded app at runtime. Use a single URL editor to form dynamic URLs from connected data attributes or app URL parameters, or add static URLs directly.
This series contains three articles, which will work you through three different cases on how the new feature works, allowing you to further utilize the Embed widget to accommodate different scenarios.