title: How can I translate a placeholder in angular 4 with jhi-translate?
body: <p>Does anyone know how to translate a placeholder in angular 4 using jhi-translate? I have saved the translations in the Json files in i18n.</p>
  
  <p>My idea below does not work
  .</p>
  
  <pre><code>placeholder="jhiTranslate='main.form.text'"
  </code></pre>