Highlight.js lets you use aliases for languages. It's list of aliases is [available here](https://highlightjs.readthedocs.io/en/latest/css-classes-reference.html#language-names-and-aliases).
According to it, both of the following code blocks are similar ``` ```javascript ``` ``` ```js ``` But in TW, `js` does not work for javascript, or any alias for other languages. I looked into the [source code of highlight.js plugin in TW](https://github.com/Jermolene/TiddlyWiki5/blob/master/plugins/tiddlywiki/highlight/files/highlight.pack.js). After prettifying it, it was clear that aliases for each language were defined in the highlight.js source code. Then I looked up the code of [highlightblock.js](https://github.com/Jermolene/TiddlyWiki5/blob/master/plugins/tiddlywiki/highlight/highlightblock.js). What I understand, this line of code is used to see if language is supported by the plugin or not ```js if(language && hljs.listLanguages().indexOf(language) !== -1) { ``` `listLanguages()` method does not support aliases. It only returns a list of full name of supported languages. Its API has another method [getLanguage()](https://highlightjs.readthedocs.io/en/latest/api.html#getlanguage-name) that supports aliases. So ``` hljs.getLanguage('javascript') // Object hljs.getLanguage('js') // Object hljs.getLanguage('blahblah') // undefined ``` So changing the offending line with ```js if(language && hljs.getLanguage(language)) { ``` fixed the issue in my tests. I have submitted a PR with this patch https://github.com/Jermolene/TiddlyWiki5/pull/3898/files I am writing it in detail in here so that if my understanding is incorrect then someone would correct me and suggest a proper solution. -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/d5c412e8-30c9-4513-a460-c31852afc4b9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

