[SOLVED] how to install highlightjs

I'am tryng to install highlightjs in my angular project. I followed these instructions :

but when i try to add this in my app.config.ts

  providers: [
    provideHighlightOptions({
      fullLibraryLoader: () => import('highlight.js')
    })
  ]

I get an error: Cannot find module 'highlight.js' or its corresponding type declarations.ts enter image description here

I'm trying to solve the problem to fully install highlightjs.

You must also install the highlight.js library. Their docs are not clear of this but their Stackblitz led me to infer.

npm install highlight.js