I know there is an existing post asking if it's possible to generate an HTML report of code coverage analysis for tests written and run with Intern, and it's been answered:
Generate HTML code coverage reports with intern
However, the post doesn't mention what type of environment that the OP runs in; i.e., are the tests running in a Node.js client? I ask because I am running my unittests using the Intern framework in a browser [edit: invoking tests comparably to http://path/to/intern-tutorial/node_modules/intern/client.html?config=tests/intern]. The article here:
https://github.com/theintern/intern/wiki/Using-and-Writing-Reporters#custom-reporters
outlines that HTML is the only reporter available for the browser platform; LCOV and LCOVHTML are not. But has that changed at all? This limited array of reporters for browsers isn't very convenient, and I was hoping to take advantage of Istanbul built into Intern, rather than try to plug in another code coverage analysis tool (or hack my own thing :( ).