init

wp-content/themes/flatsome/inc/functions/function-fallbacks.php

@@ -0,0 +1,16 @@
+<?php
+
+// Fallbacks
+function flatsome_add_fallbacks () {
+
+  $ie_css = get_template_directory_uri() .'/assets/css/ie-fallback.css';
+
+  echo '<!--[if IE]>';
+  echo '<link rel="stylesheet" type="text/css" href="'.$ie_css.'">';
+  echo '<script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.6.1/html5shiv.js"></script>';
+  echo "<script>var head = document.getElementsByTagName('head')[0],style = document.createElement('style');style.type = 'text/css';style.styleSheet.cssText = ':before,:after{content:none !important';head.appendChild(style);setTimeout(function(){head.removeChild(style);}, 0);</script>";
+  // Flexbox polyfill
+  echo '<script src="'.get_template_directory_uri() .'/assets/libs/ie-flexibility.js"></script>';
+  echo '<![endif]-->';
+}
+add_action('wp_head', 'flatsome_add_fallbacks');