Babel 6 + ES6 + Mithril + MSX + gulp ref: http://qiita.com/iktakahiro/items/f39ed7629b593063792d

file0.txt

npm install babel-plugin-mjsx --save-dev

gulp.babel.js

gulp.task('msx', () => {
    gulp.src('./src/js/before/sample.js')
        .pipe(babel())
        .pipe(gulp.dest('./src/js/after/'))
});

package.json

{
  "babel": {
    "presets": [
      "es2015"
    ],
    "plugins": [
      "mjsx"
    ]
  }
}

sample.js

'use strict';

var _mithril = require('mithril');

var _mithril2 = _interopRequireDefault(_mithril);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

view = function () {
    return {
        tag: 'div',
        children: ['\n        ', {
            tag: 'h1',
            children: ['MSXの利用'],
            attrs: { id: 'Title' }
        }, '\n        ', {
            tag: 'div'
        }, '\n        ', {
            tag: 'p',
            children: [{
                tag: 'a',
                children: ['MSX'],
                attrs: { href: 'https://github.com/insin/msx' }
            }, 'の使いかたを解説します']
        }, '\n    '],
        attrs: { id: 'wrapper' }
    };
};