(function() {

  // Feature detection results
  const supports = {};

  // Detect localStorage support
  try {
    localStorage.setItem('test', 'test');
    localStorage.removeItem('test');
    supports.localStorage = true;
  } catch (e) {
    supports.localStorage = false;
  }

  // Detect inline SVG support
  supports.inlineSVG = (function() {
    const div = document.createElement('div');
    div.innerHTML = '<svg/>';
    return (
      typeof SVGRect != 'undefined'
      && div.firstChild
      && div.firstChild.namespaceURI
    ) == 'http://www.w3.org/2000/svg';
  })();

  // Add ios class to body on iOS devices
  function iosBodyClass() {
    if(
      /iPad|iPhone|iPod/.test(navigator.userAgent)
      && !window.MSStream
      && document.body.classList
    ) {
      document.body.classList.add('ios');
    }
  }

  // Check if DOM has already loaded as we're loading async
  ['interactive', 'complete'].indexOf(document.readyState) >= 0
    ? init()
    : document.addEventListener('DOMContentLoaded', init);

  // When DOM is ready
  function init() {

    // Check for iOS
    iosBodyClass();
  }

})();