Syntax highlighting in vscode

[gasymov-rustam]

Hi all, I hope you can help me or explain to me. When I use the extension in the overall .vue file, I have the syntax highlighting working fine. But when I put the logic in a separate mixin in a .js file, all the syntax highlighting stops working
Please help me, I'm working on an old project and all the logic is written in separate files, and there I don't have absolutely syntax highlighting

Thank you very much