browserify

 1) must use sudo install globally
                    sudo npm install -g brwoserify

                     https://github.com/perliedman/reproject
                     sudo npm install reproject    // install locally is fine

                     must manually create 'dist' folder for later output file use

                  2) must use --s expose global variable function 'reproject' and or 'toWgs84' you will use later in browser js.
                        without --s , will get 'reproject' undefined error . https://makerlog.org/posts/creating-js-library-builds-with-browserify-and-other-npm-modules
                        browserify --help will list all options.  -o means output file directory

                     browserify node_modules/reproject/index.js --s reproject -o node_modules/reproject/dist/reproject.js