title: Invalid regular expression HTML Pattern
body: <p>This is my Regex:</p>
  
  <pre><code>pattern="[^\!\#\$\%\^\&amp;\*\'\|\"]{8}"
  pattern="[^!#$%^&amp;*'|"]{8}"
  </code></pre>
  
  <p>How is this invalid in my HTML input tag? I want this symbols to be restricted in my <code>textbox</code></p>
  
  <pre><code>&lt;input placeholder="Something" type="text" required autofocus ng-model="someData" pattern="[^\!\#\$\%\^\&amp;\*\'\|\"]{8}"&gt;
  </code></pre>