How do I add a custom html.node--.html.twig based on content-type? I want to override the default html.html.twig according to my custom content-type.
But I only get suggestions like:

* html--node--16.html.twig    
* html--node--%.html.twig    
* html--node.html.twig    
x html.html.twig 


I have tried for file-name 

html--node--content-type.html.twig


But this was not successful. Can anybody help?
You can use hook_theme_suggestions_HOOK_alter() to add another suggestion, something like:

function THEME_theme_suggestions_html_alter(&amp;$suggestions, $variables) {
    // Check it's a node page.
    if (($node = \Drupal::routeMatch()-&gt;getParameter('node')) &amp;&amp; $node instanceof \Drupal\node\NodeInterface) {
        // Insert as second to last so the more specific template by ID still works.
        array_splice($suggestions, count($suggestions) - 1, 0, 'html__node__' . $node-&gt;getType());
    }
}