[Vuejs]-Vue varibale inside Laravel helper

You can’t do it this way. But you can use Ziggy which allows you to use route() function in vue like you are using it in laravel.
https://github.com/tightenco/ziggy
Then in your vue component you can call route('article', {id: article.id})

You can try this

<a href="{{ route('article', ['id':'article.id']) }}">Article</a>