Missing colored syntax highlighting

[fuzunspm]

Expected Behavior

Syntax highlighting within code block seems missing. Example SS below. It looks a bit dull. Is it possible to configure it in a way that my emacs config does?

Software Versions

• Markdown Mode: 2.5-dev
• Emacs: 27.2
• OS: Arch Linux

Screenshot of Markdown Mode

Screenshot of VSCode

Screenshot of Emacs config of the same code block in a .js file

[syohex]

Could you show us your javascript configuration ? By default, markdown-mode applies js-mode for js code block. If you use another major-mode, you need to modify markdown-code-lang-modes.

[fuzunspm]

how should i set it? below is not working

(setq markdown-code-lang-modes (("js" . 'rjsx-mode)))

[syohex]

(add-to-list 'markdown-code-lang-modes '("js" . rjsx-mode))

The configuration is like above snippet. However it looks that it doesn't work. js2-mode which rjsx-mode depends on does not work too. I don't understand why those modes don't work well.

[syohex]

js-mode and rainbow-delimiters-mode work well.

[fuzunspm]

Yes same here, raindow delimeters works only