It may be related to how you convert formatter.js to CommonJS, but all of the require statements for internal modules are not using relative paths.

In the main file (dist/common/formatter.js:8-10) the require statements should be like this:

var patternMatcher = require('./pattern-matcher');
var inptSel = require('./inpt-sel');
var utils = require('./utils');

Notice the relative paths being used. The compiled CommonJS files should all be using relative paths for in-module requires 😄

Have a fix being used in a few of my smaller libs. Will port over to formatter when time permits. Thank you for reporting.

👍

+1

If I'll fix it, would you accept PR?