A third-party highlightjs libarary for the BQN array language.
Do the following for testing the highlighting on a browser. See the highlightjs docs for more.
git clone https://github.com/highlightjs/highlight.js.git
cd highlight.js/
cd extra/
git clone https://github.com/razetime/highlightjs-bqn.git
cd ..
npm install
node tools/build.js -t browser
Then you can open tools/developer.html from the highlightjs repository to test the detection and highlighting of bqn.
In the dropdown, BQN will be at the very end.