IntelliJ IDEA 2021.1 Help

JavaScript linters

IntelliJ IDEA integrates with ESLint and other most popular JavaScript code linters that detect problems in your code without executing it.

When installed and enabled, a linter activates automatically every time you open a JavaScript file, reports detected errors and warnings, and suggests quick-fixes where possible.

Descriptions of the errors detected in the current file and quick-fixes for them are available from the editor and from the Current File tab of the Problems tool window.

Errors in all previously opened files and quick-fixes for them are shown in the Project Errors tab of the Problems tool window. To open the tool window, click the Inspection widget in the upper-right corner of the editor:

Inspection widget

See View problems and apply quick-fixes in the editor and Problems tool window for details.

View problems and apply quick-fixes in the editor

  1. In the editor, hover the mouse pointer over the highlighted problem. IntelliJ IDEA shows a tooltip with a description of the problem.

    JavaScript linters: errors and warnings are highlighted, the description of a problem is shown in a tooltip.

    To resolve the problem, click <Linter name>: Fix '<rule name>' or press Alt+Shift+Enter.

  2. To resolve all the detected problems in the current file, click More actions (Alt+Enter) and select <Linter name>: Fix current file from the list.

    JavaScript linters: resolving problems

    Alternatively, press Alt+Enter and choose the relevant suggestion from the list.

Problems tool window

To open the Problems tool window, click the Inspections widget in the upper-right corner of the editor.

Inspection widget

Alternatively select View | Tool windows | Problems from the main menu or press Alt+6.

The Problems tool window consists of two tabs:

  • The Current File tab shows the errors detected in the file from the active editor tab.

    Problems tool window, TypeScript. Current File tab shows syntax errors from the file in the active editor tab
  • The Project Errors tab shows the errors in all previously opened files, with error messages grouped by files in which they were detected.

    Problems tool window, TypeScript. Project Errors tab shows syntax errors across the project

For each error IntelliJ IDEA shows a brief description and the number of the line where the error occurred. From an error message, you can navigate to the code where the problem occurred, or apply a quick-fix, or fix the problem manually in the Editor Preview pane (the Open Preview button ).

  • To open the Problems tool window, click the Inspections widget in the upper-right corner of the editor.

    Inspection widget

    Alternatively select View | Tool windows | Problems from the main menu or press Alt+6.

  • To view suggested quick-fixes for a problem, select the corresponding error message and then select Show Quick Fixes from its context menu, or click the Show Quick Fixes button on the toolbar, or just press Alt+Enter.

    To fix a problem, select the appropriate quick-fix from the list.

    Problems tool window: fix a problem
  • Alternatively, click the Open Editor Preview button to open the Editor Preview pane and fix the problem manually there, without leaving the tool window.

    Problems tool window: fix errors in the Editor Preview pane
  • To resolve the detected problems in the whole file, select <Linter name >: Fix current file from the context menu.

  • To navigate to the place where an error occurred, double-click the corresponding error message, or select Jump to Source from its context menu, or just press F4.

  • You can also edit the linter's settings, suppress a rule in the statement where a problem occurred or in the whole file, as well as exclude the current file from analysis at all. See Disable and suppress inspections for details.

    Problems tool window: context menu
  • To filter out error messages by their severity and customize their sorting, click the View Options button and select or clear the relevant items in the list.

    View Options: configuring the appearance of the Problems tool window
  • To copy an error message, select Copy Problem Description from its context menu or press Ctrl+C.

Last modified: 08 March 2021