Laravel Nova Resource Tool Route

I have a resource detail button vue which uses a route to access a controller to download a pdf. This works fine if I use an anchor href e.g

 <a  :href="'/nova-vendor/custom-resource-toolbar/product/download/'  + 
                        this.$parent.resourceId"
        class="btn btn-default btn-icon btn-white bg-primary"
        style="background-color: var(--primary); color: white; margin-top: -2px; margin-left: 3px"
      >
        Sales as PDF
      </a>

But I want some sort sort of feedback so I thought I would use a button click with a Nova.request().get.

<button class="btn btn-default btn-icon btn-white bg-primary" @click="activatePDF">TEST</button>

The method:

methods: {
    activatePDF() {
      Nova.request()
        .get(
          '/nova-vendor/custom-resource-toolbar/product/download/' +
            this.$parent.resourceId
        )
        .then(this.$toasted.show('Success!', { type: 'success' }))
        .catch(this.$toasted.show(error.response, { type: 'error' }));
      console.log(response.data);
    }

The route:

Route::get('/product/download/{id}', 'App\Http\Controllers\ProductController@downloadPDF');

All get is the "Success!" message but no download. I am a newbie but have tried many things including changing the get to a post adding .active to @click and much more but cannot get the pdf to download.