title: regex expression for any letters, space, Apostrophe and blank input
body: <p>this is the current expression i'm using, but when i input a value it only accepts 1 letter
  when i input more than 1 i get an invalid input.</p>
  
  <pre><code>"regex":"/^(?:[a-zA-Z\ \']{30}|)$/",
  </code></pre>
  
  <p>what type of expression might be suitable for the input that i'm looking for?</p>
  
  <p>ex:</p>
  
  <p>John Franklin </p>
  
  <p>or</p>
  
  <p>(blank input)</p>