This is hanging on browserify bundle() with error message: Adjacent JSX elements must be wrapped in an enclosing tag // //chart.js // import core from "./core"; <script type="text/javascript" src="https://www.google.com/jsapi"></script> <script type="text/javascript"> var helloz = "hi"; </script> // MY GULP // BUNDLE ES6 MODULES gulp.task('modules', function() { // BUNDLE CHART.JS FILE browserify({ // browserify traverses dependency tree entries: './public/_assets/source/js/chart.js', debug: true }) .transform(babelify) // transpiled source to ES5 .bundle() // bundle .pipe(source('custom_chart_bundle.js')) // write to a file using vinyl-source-stream .pipe(gulp.dest('./public/_assets/build/js')); // to this path });