Gruntfile.js

module.exports = function (grunt) {

  grunt.loadNpmTasks('grunt-browserify');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-mocha-test');
  grunt.loadNpmTasks('grunt-contrib-clean');
  grunt.loadNpmTasks('grunt-git-authors');

  grunt.initConfig({

    authors: {
      prior: [
        "Ward Cunningham <ward@c2.com>",
        "Nick Niemeir <nick.niemeir@gmail.com>"
      ]
    },

    // tidy-up before we start the build
    clean: ['client/image.js', 'client/image.js.map', 'test/test.js', 'test/test.js.map'],

    browserify: {
      plugin: {
        src: ['client/image.coffee'],
        dest: 'client/image.js',
        options: {
          transform: [[ 'coffeeify', { transpile: { presets: ['@babel/preset-env'] } } ]],
          browserifyOptions: {
            extentions: ".coffee"
          }
        }
      }
    },

    mochaTest: {
      test: {
        options: {
          reporter: 'spec',
          require: 'coffeescript/register'
        },
        src: ['test/test.coffee']
      }
    },


    watch: {
      all: {
        files: ['client/*.coffee', 'test/*.coffee'],
        tasks: ['build']
      }
    }
  });

  grunt.registerTask('build', ['clean', 'mochaTest', 'browserify']);
  grunt.registerTask('default', ['build']);

};