Highlight JavaScript in a C++ file (w/ treesitter)

Neovim
1

For a game I’m doing a lot of JavaScript/QuickJS coding in multi-line C++ blocks. The code looks like this:

//normal C++ 
void townLoad() {
  makeMusic("./static/MX_TOWN_AKU.wav", "town");
  PlayMusicStream(music["town"]);
  init["town"] = true; 
 
  //JavaScript after this line: 
  qjsutil::runJs(context, R"js( 
    const { create, insert }  = deps.gg
    const { clone, without } = deps._l      

    log('create a grid') 
    let width = 22 
    let height = 14
    const grid = create(width,height)     

    //huge block of JS here ... 

  )js");  
  //(back to C++)              
}

So notice how even on discourse here the syntax highlighting makes JavaScript one color. So this is the behavior in Neovim/treesitter too :confused:

I was looking for even a quick hack to just write an extra line or comment to trigger syntax highlighting for my specific block(s) here. Has anyone made a plugin like that ?

The closest I’ve found is something similar for but its for code blocks in Markdown files, not specific blocks in C++.

otherwise i guess maybe need to roll sleeves up with treesitter code/architecture but at a cursory glance it looks like I wouldn’t be coding my game for a few days while I study that beheamoth; here’s hoping you have a quick fix or recommended module. Thx !