When you are ready to test your app, preview it and then test it in the editor of a site. Click the icon and select Preview or Test in Editor.
Use our checklist of what to check when testing your app, to make sure you don't miss any part of your app.
Some parts of your app can be checked in Preview in Blocks, whereas others can only be tested in the editor of a site. Here is a list to help you understand what goes where. However, it's always good practice to also check everything in the editor.
What you can check in Preview
What you must test in the Editor
When you make more changes in your app and want to test them, there is no need to install it again. Just click Test in Editor again, or use the keyboard shortcuts. This creates a new testing version of the app, which updates automatically on the site you installed it on. Even if you build a minor or major version in Blocks, the site with the testing version of your app will always show the latest changes.
Note: Blocks database collections are editable in Preview mode. Make sure not to edit them by mistake.