How can I correctly integrate Vue3 Carousel as an ES module in a Laravel Blade template?

The issue stems from Blade attempting to interpret the Vue “item” variable in your route helper. Since Blade runs on the server, it doesn’t know about Vue’s runtime variables and tries to treat item as a PHP constant, hence the error.

Here are a couple of approaches to resolve this:

---

1. Use Vue Binding for the URL

Since the item data is available only at runtime in Vue, you should let Vue generate the URL. One common way is to:

• Generate a “base” URL or route pattern in Blade.
• In Vue, define a method (or computed property) that replaces placeholders with actual values from the item.

Blade Template Example:

BLADECopied
<div id="release-carousel">
  <Carousel v-bind="carouselConfig">
    <Slide v-for="(item, index) in releases" :key="index">
      <div class="text-center p-2 bg-white">
        <div class="mb-4">
          <!-- Notice we use v-bind:href to let Vue handle URL generation -->
          <a :href="generateRoute(item)">
            <picture>
              <source :srcset="`{{ asset('images/releases/thumbs') }}/${item.filename}.webp`" type="image/webp" />
              <source :srcset="`{{ asset('images/releases/thumbs') }}/${item.filename}.jpg`" type="image/jpeg" />
              <img 
                class="mx-auto img-fluid p-1 lazy"
                :data-src="`{{ asset('images/releases/thumbs') }}/${item.filename}.jpg`"
                :alt="`${item.name} - ${item.title}`"
                width="300" height="300"
              />
            </picture>
          </a>
        </div>
      </div>
    </Slide>
  </Carousel>
</div>

@push('css')
<link rel="stylesheet" href="{{ asset('css/carousel.css') }}">
@endpush

@push('scripts')
<script type="module">
  import { createApp } from 'vue'
  import vue3Carousel from 'https://cdn.jsdelivr.net/npm/vue3-carousel@0.13.0/+esm'
  import ReleaseCarousel from './release-carousel.js'

  createApp(ReleaseCarousel)
    .mount('#release-carousel')
</script>
@endpush

Vue Module Example (release-carousel.js):

JAVASCRIPTCopied
import { Carousel, Slide } from 'vue3Carousel'

export default {
  setup() {
    // Vue data and configurations
    const carouselConfig = {
      wrapAround: true,
      itemsToShow: 3,
      snapAlign: 'center',
      autoplay: '2000',
      breakpoints: {
        600: { itemsToShow: 1, snapAlign: 'start' },
        1000: { itemsToShow: 2, snapAlign: 'start' },
        1200: { itemsToShow: 3, snapAlign: 'start' }
      }
    }

    // Assuming "releases" comes from an API call or props:
    const releases = [ /* your releases data here */ ]

    // Base URL generated by Blade: Use a unique placeholder for replacement
    // Note: Make sure the generated URL is exactly what you need to replace
    const baseRoute = "{{ route('releases.show', ['id' => '__ID__', 'artist' => '__ARTIST__', 'title' => '__TITLE__']) }}";

    const generateRoute = (item) => {
      return baseRoute
        .replace('__ID__', item.encoded_id)
        .replace('__ARTIST__', item.name_slug)
        .replace('__TITLE__', item.title_slug);
    };

    return { carouselConfig, releases, generateRoute }
  },
  components: {
    Carousel,
    Slide
  }
}

In this setup:

• The <a> tag’s href attribute is bound to a Vue method generateRoute(item) that takes the Vue data and returns the full URL.
• The Blade-generated baseRoute uses placeholders (like __ID__, __ARTIST__, and __TITLE__) that are later replaced with values from each item.

---

2. Use Blade’s Literal Syntax for Vue Interpolations

If you need to output Vue expressions directly in your HTML without Blade trying to parse them, you can tell Blade not to process the Vue interpolation by prefixing the curly braces with an @ symbol. For example:

BLADECopied
<a href="@{{ 'some vue expression' }}">

However, this method is less flexible when you need to integrate with Laravel’s route helpers. It’s more common to use Vue’s binding (:href) to construct dynamic URLs.

---

Summary

• Problem: Blade is interpreting "item" as a PHP constant.
• Solution: Let Vue handle dynamic parts (like the item variable) by binding the attribute (e.g., using :href).
• Implementation: Generate a base route with placeholders in Blade and replace them in a Vue method.

Using one of these approaches should resolve the "Undefined constant 'item'" error and allow your component to work as expected.