bootstrapjsmediaquery.js

(function (window, document, undefined) {
  'use strict';
  
  // Initialize the media query
  var mediaQuery = window.matchMedia('(min-width: 560px)');
  
  // Add a listen event
  mediaQuery.addListener(doSomething);
  
  // Function to do something with the media query
  function doSomething(mediaQuery) {    
    if (mediaQuery.matches) {
      document.body.style.backgroundColor = 'CornflowerBlue';
    } else {
      document.body.style.backgroundColor = 'FireBrick';
    }
  }
  
  // On load
  doSomething(mediaQuery);

  // Modernizr
  //window.addEventListener('resize', function() {
  //  if (Modernizr.mq('(min-width: 560px)')) {
  //    document.body.style.backgroundColor = 'CornflowerBlue';
  //  } else {
  //    document.body.style.backgroundColor = 'FireBrick';
  //  }
  //}, false);
  
})(window, document);