title: Regex for checking a letter-only string without "="
body: <p>How can I check via regex if a string is:
  - letters-only (a-z, insensitive)
  - does not have an equal sign</p>
  
  <p>ex.</p>
  
  <ul>
  <li><code>class</code> - should pass </li>
  <li><code>class="something"</code> - should fail</li>
  <li><code>class=someclass</code> - should fail</li>
  </ul>
  
  <p>So far I have this:</p>
  
  <pre><code>[a-zA-Z][^=]+
  </code></pre>
  
  <p>However when I tested it on regex101 with
  <code>class=someclass</code>
  It results with:</p>
  
  <pre><code>
   - Match 1 - Full match 0-5 class
   - Match 2 - Full match  6-15 someclass
  </code></pre>
  
  <p>What am I missing here?
  Thanks!</p>