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Allow multiple view scripts per block #36176

Merged
merged 18 commits into from Apr 7, 2022
Merged

Allow multiple view scripts per block #36176

merged 18 commits into from Apr 7, 2022

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aristath
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@aristath aristath commented Nov 3, 2021

Description

Part of #33542.
This PR allows using multiple view scripts per block, by using an array for the block's viewScript.
This will allow enqueueing smaller files where appropriate, and conditionally load scripts where needed.
Included in the PR is the implementation for enqueues, as well as modifications to the navigation block, so it only loads the modals script on the frontend when a modal is used.

How has this been tested?

  • Tested by running npm run build, confirming that both view script files get generated
  • Tested by adding a navigation block, confirmed that both scripts get enqueued, then disabled modals in the block and confirmed that the modals script is no longer loaded.

UPDATE: The navigation block changes were moved to a separate PR: #40135

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

@aristath aristath requested a review from gziolo November 3, 2021 13:19
@aristath
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aristath commented Nov 3, 2021

This is still an early WIP/POC (not yet functional)
cc @gziolo since in the past we discussed this

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github-actions bot commented Nov 3, 2021

Size Change: +20 B (0%)

Total Size: 1.22 MB

Filename Size Change
build/block-library/index.min.js 174 kB +20 B (0%)
ℹ️ View Unchanged
Filename Size
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@gziolo
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gziolo commented Nov 4, 2021

This is still an early WIP/POC (not yet functional)
cc @gziolo since in the past we discussed this

That’s nice. We still can improve the initial implementation planned for 5.9 in WordPress core without too much hassle.

I think the biggest challenge here is to figure out how to update webpack config so it is able to detect more entry points when there are multiple view scripts.

@gziolo gziolo added [Feature] Block API API that allows to express the block paradigm. [Type] Enhancement A suggestion for improvement. labels Nov 4, 2021
@aristath
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aristath commented Nov 4, 2021

I think the biggest challenge here is to figure out how to update webpack config so it is able to detect more entry points when there are multiple view scripts.

Yeah, I haven't figured out that part yet 😅 Any ideas?

@gziolo
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gziolo commented Nov 4, 2021

I think the biggest challenge here is to figure out how to update webpack config so it is able to detect more entry points when there are multiple view scripts.

Yeah, I haven't figured out that part yet 😅 Any ideas?

We might need a more complex pattern matching for view scripts because view.js won't be enough as handled in:
https://github.com/WordPress/gutenberg/blob/trunk/tools/webpack/blocks.js

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gziolo commented Jan 19, 2022

In #37661, I improved the discovery of scripts used by individual custom blocks by scanning the block.json file. I even used Array.flat to account for the case when the fields provide a string or an array of strings. I haven't tested it, but it shouldn't be one line change if there are some edge cases missed.

@aristath aristath force-pushed the add/multiple-view-scripts branch 2 times, most recently from 107b772 to a280634 Compare February 3, 2022 11:07
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gziolo commented Mar 16, 2022

I think the biggest challenge here is to figure out how to update webpack config so it is able to detect more entry points when there are multiple view scripts.

We paired yesterday with @SantosGuillamot to check where we are with this PR. We managed to find a way to update webpack config for Gutenberg so it produces build files for every JavaScript file starting with view prefix. It seemed to work correctly for the Navigation block.

@aristath aristath changed the title WIP - multiple view scripts Allow multiple view scripts per block Mar 22, 2022
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That is awesome @gziolo and @SantosGuillamot, it now works as expected!
I tested everything in this PR again, confirmed it works, rebased, made a tweak to the JSON schema and I believe this is now ready to be reviewed 👍

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Nice to see it nearly ready to land. I left some detailed feedback after I compared the script handling with WP core.

We should also update the documentation for block metadata with a note that it’s going to be possible to pass an array:

https://github.com/WordPress/gutenberg/blob/trunk/docs/reference-guides/block-api/block-metadata.md#view-script

Something similar to previous notes:

Note: An option to pass also an array of editor styles exists since WordPress 5.9.0.

One more thing. For styles (excluding the first one that goes through legacy handling) we had a special render filters wired so they enqueue styles when block is present on the page. Is it possible to add something similar here?

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gziolo commented Mar 28, 2022

One more thing. For styles (excluding the first one that goes through legacy handling) we had a special render filters wired so they enqueue styles when block is present on the page. Is it possible to add something similar here?

I think that's the only remaining thing that doesn't apply to the Navigation block that has manual handling inside the render_callback implementation. In case there is no render_callback provided only the first view script gets enqueued on the frontend:

https://github.com/WordPress/wordpress-develop/blob/ad7081862489e61c89fd3f0b9fbeabdc62ed405d/src/wp-includes/class-wp-block.php#L262-L272

It's completely different from how we handle styles where we conditionally enqueue all styles listed (excluding the first one which goes through the default handling in WP core) with wp_enqueue_block_style:

gutenberg/lib/blocks.php

Lines 571 to 594 in 23f11a1

function gutenberg_multiple_block_styles( $metadata ) {
foreach ( array( 'style', 'editorStyle' ) as $key ) {
if ( ! empty( $metadata[ $key ] ) && is_array( $metadata[ $key ] ) ) {
$default_style = array_shift( $metadata[ $key ] );
foreach ( $metadata[ $key ] as $handle ) {
$args = array( 'handle' => $handle );
if ( 0 === strpos( $handle, 'file:' ) && isset( $metadata['file'] ) ) {
$style_path = remove_block_asset_path_prefix( $handle );
$args = array(
'handle' => sanitize_key( "{$metadata['name']}-{$style_path}" ),
'src' => plugins_url( $style_path, $metadata['file'] ),
);
}
wp_enqueue_block_style( $metadata['name'], $args );
}
// Only return the 1st item in the array.
$metadata[ $key ] = $default_style;
}
}
return $metadata;
}
add_filter( 'block_type_metadata', 'gutenberg_multiple_block_styles' );

Should we also introduce a similar helper function called wp_enqueue_block_script?

@getdave
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getdave commented Mar 28, 2022

🤔 Is the Navigation block going against the grain here and not following conventions or is this a special case? 👀

@gziolo
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gziolo commented Mar 28, 2022

🤔 Is the Navigation block going against the grain here and not following conventions or is this a special case? 👀

I would say the opposite. The Navigation and File blocks were updated first so the special case for render_callback is inherited from their implementation. However, it looks like it's largely confusing for block developers so we will have to to something about it at some point 😅

@getdave, can you confirm that the proposed changes to the frontend handling on the Navigation block doesn't break anything? I'm not sure whether @aristath added those changes for development purposes or it's a planned improvement that optimizes client-side code loaded depending on user selection.

@aristath
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aristath commented Apr 7, 2022

It would be my preference that the Nav block changes are extracted into a separate PR and merged once this main PR is merged. Why? Because if we subsequently find a bug it will make it much easier for Nav block contributors to rollback.

Good point. I removed the changes from this PR, and moved them to #40135 👍

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All feedback was addressed, and we have a follow-up PR for the custom languages folder that needs to be decided in WP core first.

@gziolo gziolo added the Backport to WP Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Apr 7, 2022
@gziolo gziolo merged commit 99f820e into trunk Apr 7, 2022
@gziolo gziolo deleted the add/multiple-view-scripts branch April 7, 2022 10:27
@github-actions github-actions bot added this to the Gutenberg 13.0 milestone Apr 7, 2022
@bph bph added the Needs Dev Note Requires a developer note for a major WordPress release cycle label Apr 7, 2022
@gziolo gziolo removed the Backport to WP Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Apr 14, 2022
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gziolo commented Apr 14, 2022

As noted in #39889 (comment), we didn't manage to backport these changes on time to include in WordPress 6.0 release. Let's plan to have it included in WordPress 6.1. I will update the code to ensure it reflects the revised plan.

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[Feature] Block API API that allows to express the block paradigm. Needs Dev Note Requires a developer note for a major WordPress release cycle [Type] Enhancement A suggestion for improvement.
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5 participants