Ionic 2 (v2) watching for file change in the app folder and move the files to www/build in order for liveReload to kick in

gulpfile.js

var gulp = require('gulp');

gulp.task('moveHtml', function() {
  console.log('Moving html...');

  gulp.src('app/**/*.html')
    .pipe(gulp.dest('www/build'));
});

gulp.task('watch', function(){
  gulp.watch('app/**/*.html', ['moveHtml']);
  // Other watchers
})