Convert Sass breakpoints to JS

Gruntfile.js

// Convert
// $window_s: 768px;
// $window_m: 960px;
// $window_l: 1200px;
// to
// window.window_s = 768;
// window.window_m = 960;
// window.window_l = 1200;

replace: {
  convertSassBreakpointsToJS: {
    src: '/scss/settings/_breakpoints.scss',
    dest: '/js/breakpoints.js',
    replacements: [
      {
        from: '$',
        to: 'window.'
      },
      {
        from: ':',
        to: ' ='
      },
      {
        from: 'px',
        to: ''
      }
    ]
  }
}