To download the Developer Edition, click the Download the SDK button highlighted above. Unlike the beta version, the widget code is open source in the final version.
To help boost your productivity, great effort has been put into the SDK documentation. Information about classes, methods, and properties in the API Reference are pulled dynamically from the source code of Experience Builder. As a result, you can access the latest API information when a new release arrives.
With Guide and Sample Code, you can learn to extend Experience Builder, not only with custom widgets and themes, but also with message actions. And all the samples are available on GitHub for you to download. We are also working on tutorials to help you get started quickly. Stay tuned.
There are a few ways you can access the Developer Edition on the ArcGIS for Developers website. One of the quickest routes starts with the Documentation tab as shown below.
Download apps to host yourself
In addition to the new features added to the final version of the Online Edition, the Developer Edition has added the Download button in two places as highlighted below, so you can easily deploy apps to your own server. Downloaded apps are zip files.
Learn React and TypeScript
The ArcGIS Experience Builder Team