Bad value X for attribute “href” on element “a”: Invalid host: Illegal character in domain: tab is not allowed.

To fix the issue of having a bad value for the src attribute on an img element due to having a tab, new line, or carriage return, you need to ensure that the src attribute does not contain any additional whitespace characters like tab, new line, or carriage return.

Incorrect code:

<img src="images/example.jpg
" alt="Example Image">

Corrected code:

<img src="images/example.jpg" alt="Example Image">

By removing the extra whitespace characters (new line in this case) and ensuring that the src attribute value is properly enclosed within quotes, the issue should be resolved.

Elements with the role tab must either be a child of an element with the tablist role, or have their id part of the aria-owns property of a tablist.

An element with the tab role controls the visibility of an associated element with the tabpanel role. The common user experience pattern is a group of visual tabs above, or to the side of, a content area, and selecting a different tab changes the content and makes the selected tab more prominent than the other tabs.

Example:

<div class="tabs">
  <div role="tablist" aria-label="Sample Tabs">
    <button role="tab" aria-selected="true" aria-controls="panel-1" id="tab-1" tabindex="0">
          First Tab
    </button>
    <button role="tab" aria-selected="false" aria-controls="panel-2" id="tab-2" tabindex="-1">
          Second Tab
     </button>
  </div>
  <div id="panel-1" role="tabpanel" tabindex="0" aria-labelledby="tab-1">
    <p>Content for the first panel</p>
  </div>
  <div id="panel-2" role="tabpanel" tabindex="0" aria-labelledby="tab-2" hidden>
    <p>Content for the second panel</p>
  </div>
</div>