I have a maven execution that runs a javascript compressor as a command line program, however, this tool also does some jslint checks as well.
If these jslint check
To my knowledge, exec:exec will fail the build if the return code of the executed command is not 0
(or one of the configured successCodes). Maybe you can build something around this.
As an alternative, have a look at these plugins, they both can fail a build on problems:
Depending on what you need exactly, there is also the Maven Javascript Plugin.
And also have a look at this Maven plugins for javascript question.