Polymer/Closure: Step #1, Merge and split

gulpfile.js

const gulp = require('gulp');
const vulcanize = require('gulp-vulcanize');
const crisper = require('gulp-crisper');

gulp.task('merge', function() {
  return gulp.src('src/elements.html')
    .pipe(vulcanize({
      excludes: ['bower_components/polymer/polymer.html'],  // polymer doesn't compile properly
    }))
    .pipe(crisper({onlySplit: true}))  // don't inline script, since we compile it again
    .pipe(gulp.dest('dest'));
});