laravel方法内部如何在javascript代码中使用javascript vars？

I have simple javascript code:

var photo = data.photo;
console.log("{{url('" + photo + "')}}");

Here I use laravel url() method. But I can't display value photo inside laravel method. How I can display it?

It's a bad practice to mix Blade syntax with JS. You should do something like this in one of Blade templates:

<script>
    let window.url = {{ url('/') }}
</script>

Then in JS files use this variable:

var photo = data.photo;
console.log(window.url + photo);

You'll find another related code example in my Laravel best practices repo.