title: How to make regex case insensitive?
body: <p>If I am matching a word in a regex <code>'Strict-Transport'</code> how can I make it case insensitive? Is there any way other than putting the two character cases [Ss] for each character because it is not about the initials, but all the characters can come in any case? </p>
  
  <p>I looked at previous posts but there are not like my case. This <a href="https://stackoverflow.com/questions/9655164/regex-ignore-case-sensitivity">post</a> for example shows how to make regex case insensitive when using list of characters <code>[]</code>. But my case is a word in regex.  </p>