title: Manually sanitize a string
body: <p>I have an <code>textarea</code> where the user will type in some text. The text cannot be JavaScript or HTML etc. I want to manually sanitize the data and save it to a string.</p>
  
  <p>I cannot figure out how to use <code>DomSanitizationService</code> to manually sanitize my data.</p>
  
  <p>If I do <code>{{ textare_text }}</code> on the page then the data is correctly sanitized. </p>
  
  <p>How do I do that manually to a <code>string</code> I have?</p>