I just noticed the syntax highlighting on the demo page is different from v3.3.1 that I'm using. Steps to reproduce:

1. Go to https://prism-code-editor.netlify.app/
2. Change theme to VS Code Dark
3. Update Config tab: language: 'javascript',
4. Click Run
5. Paste this code:

function test() {
  const re = /^test$/i;
  const obj = {
    "str": "string",
    "int": 1,
    "bool": true
  };
}

You should see this:

Now go here:

https://stackblitz.com/edit/vitejs-vite-anepnm?file=src%2Fmain.ts

Notice the regex doesn't look exactly the same:

Looks like it's missing some anchor tags that only exist on the demo page: