Use Babel (ES6) with Sails JS

Instructions.md

Inspired by this issue, with these instructions you should be able to get Babel transpiling your JS in Sails JS for the client side.

1. Install Grunt Babel npm install --save grunt-babel
2. Create a babel.js file under tasks/config and add something like the following:

module.exports = function(grunt) {

    grunt.config.set('babel', {
      dev: {
        files: [{
          expand: true,
          cwd: 'assets/js/',
          src: ['**/*.js', '!dependencies/**/*.js'],
          dest: '.tmp/public/js/',
          ext: '.js'
        }]
      }
    });

    grunt.loadNpmTasks('grunt-babel');
};

It's up to you, but I'm not touching the dependencies folder.

3. Since Babel copies the JS over, update the copy:dev tasks's src to exclude js (copy.js under tasks/config). It should looks something like this:

src: ['**/*.!(coffee|less|js)'],

4. Update both compileAssets.js and syncAssets.js under tasks/config to include the Babel dev task: 'babel:dev'

That should do it. Try running sails lift --verbose to see if Babel is running, and then try writing some fancy ES6! If I'm missing something please advise.