select-translate.html

<!doctype html>
<html>

<head>
       
        <!-- <meta http-equiv="Content-Security-Policy" content="script-src 'self' 'unsafe-inline' 'unsafe-eval' 'sha256-B2yPHKaXnvFWtRChIbabYmUBFZdVfKKXHbWtWidDVF8='"> -->
    <title>Test</title>
</head>


<body > 
    <div  id="app">

    <p>to translate:</p>
    <select v-model="secondTargetLang" v-on:change="setTargetLanguage" >
        <option selected disabled value="">Please select one</option>
        <option v-for="(item,lng) in languages" :value="item">{{lng}}</option>
    </select> 
    <script src="vue.js"></script>
    <script src="popup.js"></script>
  

   <script>

   </script>

</div>
</body>

</html>