Enable Dart support in project <project name>
Dart SDK path
In this field, specify the location of the downloaded Dart SDK. Type the path manually or click and choose the path in the dialog box that opens. If PhpStorm recognizes the Dart SDK correctly, its revision number is displayed in the Version read-only field.
In this read-only field, PhpStorm shows the revision number of the detected Dart SDK, provided that the SDK is recognized correctly.
Check SDK update
When this checkbox is selected, PhpStorm checks whether the specified above version of SDK is the latest one. If a newer version of SDK is available, PhpStorm displays a pane at the top of the active editor informing you that a newer SDK version has been released. Do one of the following:
From the list, choose the release types of SDK to look in, the available options are:
Webdev server port
If you are debugging your Dart web application with Dart webdev daemon, configure the port in the Dart Web run/debug configuration, see Running and debugging Dart web applications with webdev daemon.