Add frameworks and technologies
For developing framework-specific applications, IntelliJ IDEA features facets. Facets contain libraries, dependencies, and technologies, and they provide you with additional UI elements for configuring framework-specific settings.
IntelliJ IDEA can identify a file or a directory that is typical for a certain framework, and add the necessary facet for you. Once the facet is detected and added, IntelliJ IDEA will inform you about the missing configuration and will suggest the necessary actions.
If a facet is not detected automatically, you can add it manually. You can add more than one facet to a module.
Manually add a facet to a module
In the Project tool window Alt+1, right-click the module to which you want to add a facet, and select Add Framework Support.
Select the necessary framework from the list. Depending on your choice, you might be prompted to configure additional settings (for example, to configure a library).
Apply the changes and close the dialog.
Disable framework auto-detection
By default, auto-detection is enabled for all the supported frameworks. You can disable framework auto-detection completely, or exclude individual frameworks from auto detection.
Click on the toolbar Ctrl+Shift+Alt+S and select Facets.
Select Detection and click Alt+Insert.
From the Framework to Exclude list, select the necessary option. You can disable auto-detection of a specific framework only in one directory or in the whole project. The list also allows you to disable auto-detection of all frameworks in a specific directory.
If you want to disable auto-detection of all frameworks in the whole project, deselect the Enable framework detection checkbox.
In this dialog, you can also remove a framework or add a new one.