How can I get the cyclomatic complexity by method of a collection of Javascript files?

I want to programmatically extract the cyclomatic complexity of all methods in a javascript project.

I know eslint can do this, but the project already has an _eslintrc.json defined, and I would like to avoid modifying it.

Is it possible to get eslint to write the cyclomatic complexity of all methods of a javascript project to a file without changing _eslintrc.json, perhaps by configuring it from the command line?