68.js

  // convert React components to be used in the browser
  gulp.task('browserify', function() {
    var babelifyConfig = babelify.configure({presets: ['es2015', 'react'], extensions: ['.jsx']});

    return browserify({
        entries: 'src/app.jsx', // the same as "--extension=.jsx src/**/*.jsx"
        extensions: ['.jsx']
      })
      .transform(babelifyConfig) // the same as -t command line parameter
      .bundle() // "readable stream with the javascript file contents"
      .pipe(source('bundle.js')) // "conventional text stream at the start of our gulp pipeline", wrapped with "pipe" method
      .pipe(gulp.dest('dist/bundle.js')); // standard gulp way to redirect gulp pipe to directory
  });