IE11でテンプレートリテラルは使えない


index.html
<!doctype html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <title>JavaScriptドリル</title>
</head>
<body>
  <script src="script.js">  </script>

</body>
</html>
script.js
//キーイベント
document.addEventListener('keydown',function(event){
    var keyName = event.key;
    if(event.ctrlKey){
        console.log(`keydown:${keyName}`);
    } else if (event.shiftKey) {
        console.log(`keydown:${keyName}`);
    } else {
        console.log(`keydown:${keyName}`);
    }
});
 ie

Chrome

IE