title: How to add pattern to validate not white spaces only in html pattern?
body: <p>I want to validate that a client add any value into an input but can't add only white spaces. The client can put numbers, letters or characters and also white spaces between words.</p>
  
  <pre><code>&lt;input class="form-control" 
         name="description" 
         placeholder="Add your description" 
         ng-model="$ctrl.description" 
         pattern="^[\\S]([\\wéáíóúñÑ,.:-¿?!() ])+$" 
         required&gt;
  </code></pre>
  
  <p>What can I put in the pattern to validate that in html code?.</p>