Prevent JSHint warning that 'functionName is defined but never used'

To avoid the warning

defined but never used

in jslint in your javascript add comments like:

 /*exported formValidationSetup, refreshErrorMessages */

In jshint and jslint you can set the unused option to false:

 /*jshint unused:false*/

See Options

I had this problem with should and expect in Chai tests. I ended up with this pattern:

'use strict';

var request = require('supertest');
var should = require('chai').should();  // jshint ignore:line
var expect = require('chai').expect;    // jshint ignore:line

process.env.NODE_ENV = 'test';
var appPromise = require('./index');

describe('GET /r_u_up', function() {

  it('respond with 204', function(done) {
    appPromise.then(function(app) {
      request(app)
      .get('/r_u_up')
      .expect(204, done);
    });
  });

});

You can simply use

"unused": false,

in your .jshintrc

Interestingly, adding 'use strict'; inside the IIFE suppresses the error. Not sure why though.

A better way not touching the Gruntfile.js in a typical Yoeman setup is to edit the .jshintrc file (a hidden file in Unix system). And update the content as the following:

{
  "curly": true,
  "eqeqeq": true,
  "immed": true,
  "latedef": true,
  "newcap": true,
  "noarg": true,
  "sub": true,
  "undef": true,
  "unused": false, // the change is here
  "boss": true,
  "eqnull": true,
  "node": true
}

set the "unused" to false.