Interactive debugger console

Run JavaScript in the Console

1. Start typing a statement at > in the input field. As you type, CLion suggests variants for completion.

2. Select the relevant statement and press Enter. CLion shows its value in the console.

   

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   CLion shows previews for objects so you do not need to expand them. If you still expand an object, you get an overview of just its own properties, the __proto__ contents are hidden by default.

Navigate to source code

• At each line with output of console.*, CLion shows the name of the file and the line where it was called. Click this link to jump to the call in the source code.

  

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• The Console also shows stack traces. Click the link next to a reported problem to jump to the line of code where this problem occurred.

  

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Filter out messages

The Console tab shows objects in a tree view, with stack traces collapsed by default. Warnings console.warn(), errors console.error(), and info console.info() messages have different icons and background colors to make them easier to notice.

• To hide log messages of specific types, click and select the severities to filter out.

  

Group messages

• The log messages grouped using console.group() and console.groupEnd() are displayed as a tree. To show the output collapsed by default, use console.groupCollapsed().

  

Apply CSS styles

• Use CSS and the %c marker to apply styles to log messages.

  

  See Styling console output with CSS for details.