Add @babel/[email protected] for the intel-hex library.

Author: microbit-carlos

editor.html

@@ -260,6 +260,7 @@ <h2><i class="fa fa-unlock-alt"></i> <strong>{{ title }}</strong></h2>
         <script src="static/js/encoding.js" type="application/javascript"></script>
         <script src="static/js/mustache.min.js"
             type="application/javascript"></script>
+        <script src="static/js/polyfill.min.js" type="application/javascript"></script>
         <script src="static/js/intel-hex.browser.js" type="application/javascript"></script>
         <script src="blockly/blockly_compressed.js"></script>
         <script src="blockly/blocks_compressed.js"></script>