title: How to perform Control+Click on a multi-select option in protractor?
body: <p>I'm trying to click on multiple selections in a multi select box. But I'm unable to perform the same. </p>
  
  <p>What i have tried so far:</p>
  
  <pre><code>let input = $('input');
  let option1 = input.all(by.cssContainingText('option','One'));
  let option2 = input.all(by.cssContainingText('option','Two'));
  option1.click();
  browser.actions().mouseMove(option2).keyDown(protractor.Key.CONTROL).click().perform();
  </code></pre>
  
  <p>This solution is based on <a href="https://stackoverflow.com/a/27832799/8558515">this answer</a> but it throws an error: <code>unknown error: at least an element or offset should be set</code>. It also shows <code>Promise rejection was handled asynchronously</code> in browser.pause() logs while the click event is invoked.</p>
  
  <p>Any help would be appreciated!</p>