IntelliJ IDEA 2017.3 Help

JavaScript

This feature is only supported in the Ultimate edition.

The following is only valid when JavaScript Support Plugin is installed and enabled!

File | Settings | Languages and Frameworks | JavaScript for Windows and Linux
IntelliJ IDEA | Preferences | Languages and Frameworks | JavaScript for macOS
Ctrl+Alt+S settings


Use the pages in this section to specify the JavaScript language version for your project and configure JavaScript support in it.

In this part:

ItemDescription
JavaScript Language Version From this drop-down list, choose the JavaScript language version that represents the set of the language features to use in your project. The available options are:
Prefer Strict mode Select this checkbox to have the strict mode standard applied to JavaScript code. This helps improve your code by enforcing best practices and suppressing insecure ones.
Only type-based completion
  • When this checkbox is cleared, the completion list contains multiple variants in complicated cases.
  • When the checkbox is selected, the completion list strongly depends on the IntelliJ IDEA type inference. This makes completion more precise but in case of poor inference the list may be empty.
By default, the checkbox is cleared.
Flow package or executable In this field, specify the path to the node_modules\flow-bin package or the Flow binary executable file. To use node_modules\.bin\flow make sure the path to Node.js is added to the PATH environment variable.

The field is available only when Flow is chosen from the JavaScript Language Version drop-down list.

Use Flow server for: In this area, specify the basis for coding assistance by selecting or clearing the following checkboxes:
  • Type checking: When this checkbox is selected, syntax and error highlighting is provided based on the data received from the Flow server. When the checkbox is cleared, only the basic internal IntelliJ IDEA highlighting is available.
  • Navigation, code completion, and type hinting: When this checkbox is selected, suggestion lists for reference resolution and code completiong contain both suggestions retrieved from integration with Flow and suggestions calculated by IntelliJ IDEA. When the checkbox is cleared, references are resolved through IntelliJ IDEA calculation only.

The checkboxes are available only when the path to the Flow executable file is specified.

Save all modified files automatically Keep this checkbox selected to ensure that Flow is applied continuously because Flow checks the current files only after all the other modified files are saved.
Last modified: 30 November 2017

See Also

Language and Framework-Specific Guidelines: