Issues with DefaultAttributes CommonMark Extension

[sebandrei]

Hello,

I'm trying to enable the bundled DefaultAttributes CommonMark extension but it's not working. I have successfully enabled other extensions (AttributesExtension, ExternalLinks, Footnotes etc.) in the same way and these work. It's just the DefaultAttributes that I'm having issues with. However, I don't get an error message. When I inspect my pages I see that the classes are not being injected as they should be.

You'll find the two files I'm modifying to try to enable the DefaultAttributes extension below. I'm trying to add the class 'blockquote' as the default class for all blockquote elements.

markdown.php

<?php

return [

    /*
    |--------------------------------------------------------------------------
    | Markdown Parser Configurations
    |--------------------------------------------------------------------------
    |
    | Here you may define the configuration arrays for each markdown parser.
    | You may use the base CommonMark options as well as any extensions'
    | options here. The available options are in the CommonMark docs.
    |
    | https://statamic.dev/extending/markdown#configuration
    |
    */

    'configs' => [

        'default' => [
            // 'heading_permalink' => [
            //     'symbol' => '#',
            // ],
        'external_link' => [
            'internal_hosts' => 'http://185.XXX.XXX.39/', // TODO: Don't forget to set this!
            'open_in_new_window' => true,
            'html_class' => 'external-linkzzz',
            'nofollow' => '',
            'noopener' => 'external',
            'noreferrer' => 'external',
        ],

        'default_attributes' => [

            BlockQuote::class => [
            'class' => 'blockquote',
        ],

        ],

        'footnote' => [
            'container_add_hr' => true,
        ],

        'table_of_contents' => [
        'html_class' => 'table-of-contents',
        'position' => 'top',
        'style' => 'bullet',
        'min_heading_level' => 1,
        'max_heading_level' => 6,
        'normalize' => 'flat',
        'placeholder' => null,
    ],

        ],


    ],

];

AppServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Statamic\Statamic;
use Statamic\Facades\Markdown;

use League\CommonMark\Extension\Footnote\FootnoteExtension;
use League\CommonMark\Extension\DefaultAttributes\DefaultAttributesExtension;
use League\CommonMark\Extension\Attributes\AttributesExtension;
use League\CommonMark\Extension\ExternalLink\ExternalLinkExtension;
use League\CommonMark\Extension\HeadingPermalink\HeadingPermalinkExtension;
use League\CommonMark\Extension\TableOfContents\TableOfContentsExtension;
use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;


class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        //
    }

    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {
        Markdown::addExtensions(function () {
            return [new ExternalLinkExtension, new HeadingPermalinkExtension, new TableOfContentsExtension, new DefaultAttributesExtension, new AttributesExtension];
        });
    }
}

Has anyone managed to enable this extension? I'd be grateful for any help or hints you can offer.

[jasonvarga]

It seems to work fine here. Make sure you are importing the BlockQuote class in your config file.

+ use League\CommonMark\Extension\CommonMark\Node\Block\BlockQuote;

<?php

return [

  'configs' => [
    'default' => [
      'default_attributes' => [
        BlockQuote::class => [
          'class' => 'blockquote',
        ],
      ],
    ],
  ],

];

[sebandrei]

This works. Thank you! I didn't realize I needed to add the Blockquote classs in markdown.php..