Cannot use span tag in "code" tag any more

[MagicJack]

Describe the issue/behavior that seems buggy
Up to ver.10.3.7 I can add some customization tags between <code> and </code>. But this feature seems to be removed in version 11.

Sample Code or Instructions to Reproduce

<div class="code">
<pre><code class="plaintext">&gt; <span style='color:orange'>install.packages('IRkernel')</span>
</code></pre>
</div>

the related script and style and activation are below.

<link href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.5.0/styles/tomorrow-night-bright.min.css" rel="stylesheet" />
<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.5.0/highlight.min.js" type="text/javascript"></script>
<script>hljs.highlightAll();</script>

Expected behavior
The color of text install.packages('IRkernel') is orange

Additional context
Is this feature removed? or is there other method instead of just using hljs.hilightAll()

[joshgoebel]

This change of behavior was very intentional - and there is no way to do this anymore with only the core library.

Context: #2889

This functionality could be added back via plugin if anyone wanted to maintain the code, but so far no one has stepped up to the plate to do so.

plaintext

If all you care about is plaintext then see the README for how to ask Highlight.js to ignore that block entirely, in which case the HTML you're using will "just work" since it's just HTML - there is no need for this to be processed by Highlight.js at all. Though for styling reasons you may still want to add the hljs class for visual consistency with other code blocks.