Fix: Embed Block: Match HTML in the editor and frontend

[hbhalodia]

What?

• Fixes - Embed Block: Match HTML in the editor and frontend #65179

Why?

• To match the exact HTML for frontend and backend as per - Embed Block: Match HTML in the editor and frontend #65179

How?

• PR removes the block wrapper div, instead adds figure as a wrapper, so it matches with frontend markup.

Testing Instructions

1. Open any post/page.
2. Add embed block.
3. Add URL to be embeded, check for frontend and backend markup.
4. It should be similar.

Testing Instructions for Keyboard

• None.

Screenshots or screencast

Backend

<figure tabindex="0" class="block-editor-block-list__block wp-block is-selected wp-embed-aspect-16-9 wp-has-aspect-ratio wp-block-embed" id="block-8d19fac7-16f5-44ac-8ae0-6630fd12dc9d" role="document" aria-label="Block: YouTube Embed" data-block="8d19fac7-16f5-44ac-8ae0-6630fd12dc9d" data-type="core/embed" data-title="YouTube Embed">
    <div class="wp-block-embed__wrapper">
        <iframe title="Embedded content from www.youtube.com" class="components-sandbox" sandbox="allow-scripts allow-same-origin allow-presentation" width="462" height="260">
        </iframe>
    </div>
</figure>

Frontend

<figure class="wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio">
    <div class="wp-block-embed__wrapper">
        <iframe title="Alexandre Corbeil on Gaining New Skills at Trebas Institute Toronto" width="500" height="281" src="https://www.youtube.com/embed/BOM34PANOHM?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen="">
    </iframe>
    </div>
</figure>

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: hbhalodia <hbhalodia@git.wordpress.org>
Co-authored-by: t-hamano <wildworks@git.wordpress.org>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[t-hamano]

Thanks for the PR!

There are two things that need to be addressed in order for this PR to move forward.

Fix E2E tests

The figure tag applies to the block itself, not inside it. Therefore, currenEmbedBlock.locator('figure') can no longer find the figure element.

The following changes are required:

diff --git a/test/e2e/specs/editor/various/embedding.spec.js b/test/e2e/specs/editor/various/embedding.spec.js
index fb9746dce5..fe488f9130 100644
--- a/test/e2e/specs/editor/various/embedding.spec.js
+++ b/test/e2e/specs/editor/various/embedding.spec.js
@@ -134,15 +134,15 @@ test.describe( 'Embedding content', () => {
                        'https://developer.wordpress.org/block-editor/reference-guides/block-api/block-attributes/'
                );
                await expect(
-                       currenEmbedBlock.locator( 'figure' ),
+                       currenEmbedBlock,
                        'WordPress valid content. Should render valid figure element.'
-               ).toHaveClass( 'wp-block-embed' );
+               ).toHaveClass( /wp-block-embed/ );
 
                await embedUtils.insertEmbed(
                        'https://www.youtube.com/watch?v=lXMskKTw3Bc'
                );
                await expect(
-                       currenEmbedBlock.locator( 'figure' ),
+                       currenEmbedBlock,
                        'Video content. Should render valid figure element, and include the aspect ratio class.'
                ).toHaveClass( /wp-embed-aspect-16-9/ );

Restore is-type-video CSS class

On the frontend, the figure tag may have classes like is-type-video applied, but not in the editor. We need to restore the removed CSS to the block wrapper.

[hbhalodia]

Thank You, @t-hamano for review. I would address the requested feedbacks.

[hbhalodia]

Hi @t-hamano, On adding the className to the block wrapper, some functionalities are breaking in the editor, for example, If I do not add the class, then if you click on the video, you can see the block controls, and you can update it, but on adding the class, block controls are not visible, and you would not able to update anything. Here is the screencast for the same.

issue-embed.1.mov

[t-hamano]

We cannot add the className prop directly to the figure element.

The blockProps itself contains classNames, but if we add the className prop after blockProps, the className from blockProps will be overwritten and the block will not work properly.

We will probably need to add the class name via useBlockProps, like so:

const blockProps = useBlockProps( {
	className: clsx( {
		'is-type-video': 'video' === type,
	} ),
} );

[hbhalodia]

Hi @t-hamano, I have added the requested changes, and added the fix by changing the blockprops.className, this is because, className and type are added after the blockProps is being added, hence we cannot directly add there, so need to update the className in a way.

Thank You,

[t-hamano]

@hbhalodia Thanks for the update!

I've tried several providers, or updating additional CSS classes, etc. and everything seems to work fine.

• Could you rebase this PR? It should fix the E2E test failure.
• This might be a matter of preference, but class names might be better for an ad-hoc approach:

  diff --git a/packages/block-library/src/embed/edit.js b/packages/block-library/src/embed/edit.js
  index b69fc75cef..17f6261751 100644
  --- a/packages/block-library/src/embed/edit.js
  +++ b/packages/block-library/src/embed/edit.js
  @@ -251,9 +251,6 @@ const EmbedEdit = ( props ) => {
                  className: classFromPreview,
          } = getMergedAttributes();
          const className = clsx( classFromPreview, props.className );
  -       blockProps.className = clsx( blockProps.className, className, {
  -               'is-type-video': 'video' === type,
  -       } );
   
          return (
                  <>
  @@ -265,7 +262,12 @@ const EmbedEdit = ( props ) => {
                                  toggleResponsive={ toggleResponsive }
                                  switchBackToURLInput={ () => setIsEditingURL( true ) }
                          />
  -                       <figure { ...blockProps }>
  +                       <figure
  +                               { ...blockProps }
  +                               className={ clsx( blockProps.className, className, {
  +                                       'is-type-video': 'video' === type,
  +                               } ) }
  +                       >
                                  <EmbedPreview
                                          preview={ preview }
                                          previewable={ previewable }

  Similar approaches can be found here and here.
• While testing this PR, I noticed that there were some CSS classes missing from the editor. It would be nice to address this in a follow-up:
  • wp-block-embed-{variationName} (example: wp-block-embed-youtube)
  • is-provider-{providerName} (example: is-provider-youtube)
  • is-type-rich (For example, when you embed Twitter, this CSS class is added to the front-end:)

[hbhalodia]

Hi @t-hamano, thanks for the feedback. I would update the PR with requested changes.

[hbhalodia]

Hi @t-hamano, I have updated the PR with the requested changes. Can you please review the same.
Thank You,

[t-hamano]

LGTM! Thanks for the update 👍