title: Pattern that restricts user to enter special characters for first character
body: <p>I have a requirement for a input field that should allow numbers,alphabets and special characters like #,$,%,^ etc.But with only one condition that the first character that I enter in the text box should not be a special character.</p>
  
  <p><strong>Example:</strong></p>
  
  <ol>
  <li>@Test123  --Invalid character</li>
  <li>Test@123  --Valid  character</li>
  <li>T@est123% --Valid character</li>
  </ol>
  
  <p>I tried this <code>ng-pattern="/^([a-zA-Z0-9]+)([a-zA-Z0-9 &amp;()_+@&amp;\-=\\|,.\/?\s]+)$/"</code>
  But not working.</p>