If a browser matches Internet Explorer, the dashboard will display a notice recommending a more modern browser.
Props youknowriad, sabernhardt, afercia, SergeyBiryukov, davidbaumwald, netweb, johnbillion, jeherve.
See #48743.
Built from https://develop.svn.wordpress.org/trunk@51117
git-svn-id: http://core.svn.wordpress.org/trunk@50726 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Additionally, add a notice for when you are editing the "latest posts" page.
Fixes#45537.
Props cameronjonesweb, swissspidy, hannahmalcolm, Fantasy1125, ArnaudBan, grantmkin, youknowriad, knutsp, SergeyBiryukov, audrasjb, whyisjake.
Built from https://develop.svn.wordpress.org/trunk@51116
git-svn-id: http://core.svn.wordpress.org/trunk@50725 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This affects:
* `validate_plugin_requirements()`
* `validate_theme_requirements()`
Historically, the `Requires PHP` header was introduced in #meta2952 for the Plugin Directory first, so at the time it made sense to have it defined in the same place as `Requires at least`, which only existed in `readme.txt`.
Since parsing of PHP and WordPress requirements was later added to WordPress core, the core should retrieve all the necessary data from the main plugin or theme file and not from `readme.txt`, which only contains the data meant for the Plugin or Theme Directory.
The recommended place for `Requires PHP` and `Requires at least` headers is as follows:
* The plugin's main PHP file
* The theme's `style.css` file
The place for the `Tested up to` header remains in `readme.txt` for the time being, as it's not used by WordPress core.
Follow-up to [44978], [45546], [47573], [47574], [meta5841], [meta9050].
Props afragen, Otto42, joyously, williampatton, audrasjb.
Fixes#48520. See #48515, #meta2952, #meta4514, #meta4621.
Built from https://develop.svn.wordpress.org/trunk@51092
git-svn-id: http://core.svn.wordpress.org/trunk@50701 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix the enter key in profile form fields moving focus to the application password input instead of submitting the profile update for. Replace the submit button type used for application passwords with `button type="button"` and ensure that the enter key's native behavior isn't overwritten.
props audrasjb, alexstine, promz, sabernhardt.
Fixes#52849.
Built from https://develop.svn.wordpress.org/trunk@51086
git-svn-id: http://core.svn.wordpress.org/trunk@50695 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add accessible names to several theme controls so provide better context for screen reader users. Change theme details element into a button that can receive focus. Ensure focus is set back on existing theme when theme details modal is closed.
props alexstine, poena.
Fixes#52649.
Built from https://develop.svn.wordpress.org/trunk@51083
git-svn-id: http://core.svn.wordpress.org/trunk@50692 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Technically, this is redundant, as the `comment_author`, `comment_author_email`, and `comment_author_url` fields are already escaped via `get_comment_to_edit()` before the form is displayed.
However, this brings some consistency with the `comment_author` and `comment_author_url` fields being escaped in the same form.
Follow-up to [11721].
Props utsav72640.
Fixes#53349.
Built from https://develop.svn.wordpress.org/trunk@51080
git-svn-id: http://core.svn.wordpress.org/trunk@50689 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Switch the display to flex. The action items use their intrinsic space, rather than a fixed grid, which prevents too much space between items on larger mobile screens.
Props arunsathiya, sabernhardt, danfarrow, notlaura, aliveic, y_kolev
Fixes#48546, #47895.
Built from https://develop.svn.wordpress.org/trunk@51073
git-svn-id: http://core.svn.wordpress.org/trunk@50682 1a063a9b-81f0-0310-95a4-ce76da25c4cd
By the time the tests run, both `wp_is_site_protected_by_basic_auth()` and `rest_url()` functions are available, so there is no need to check for their existence.
Follow-up to [44986], [51057].
Props Clorith, costdev, SergeyBiryukov.
Fixes#52642.
Built from https://develop.svn.wordpress.org/trunk@51066
git-svn-id: http://core.svn.wordpress.org/trunk@50675 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Adds the `'sidebar_admin-setup'`, `'sidebar_admin_page'`, and
`current_theme_supports( 'widgets' )` check to the widgets block editor so that
the block editor screen is more compatible with the classic screen.
Fixes#53288.
Props isabel_brison.
Built from https://develop.svn.wordpress.org/trunk@51061
git-svn-id: http://core.svn.wordpress.org/trunk@50670 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The test to confirm if Authorization headers can be used and recognized by WordPress needs to include a username and password combination that WordPress can compare against during the testing phase. The inclusion of credentials here would unfortunately also invalidate any existing basic auth session for the site, for example if the user had added this as an extra layer of security on their back-end.
This test is now skipped if the `wp_is_site_protected_by_basic_auth()` function detects that basic auth is being used, since the act of using basic auth to access the site confirms that this feature is working as expected in the first place.
Props WebDragon, TimothyBlynJacobs, costdev.
Fixes#52642.
Built from https://develop.svn.wordpress.org/trunk@51057
git-svn-id: http://core.svn.wordpress.org/trunk@50666 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This ensures correct load order when style concatenation is used, e.g. when `SCRIPT_DEBUG` is off.
Additionally, make sure the `WP_CONTENT_DIR` constant is defined for use in `get_theme_root()` via `get_stylesheet_directory()`.
Follow-up to [50992], [51001], [51013].
Props nosolosw.
See #53175.
Built from https://develop.svn.wordpress.org/trunk@51056
git-svn-id: http://core.svn.wordpress.org/trunk@50665 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This updates the following dependencies:
- `chalk` from `4.1.0` to `4.1.1`.
- `dotenv` from `8.2.0` to `10.0.0`.
- `grunt` from `1.4.0` to `1.4.1`.
- `sass` from `1.32.12` to `1.34.0`.
- `sinon` from `10.0.0` to `11.1.1`.
- `uglify-js` from `3.13.6` to `3.13.8`.
See #52624.
Built from https://develop.svn.wordpress.org/trunk@51040
git-svn-id: http://core.svn.wordpress.org/trunk@50649 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add `$status` parameter to `post_exists()` to allow developers to specify a post type, date and status to ensure they hit the `wp_posts` table's `type_status_date` index when determining if a post exists.
Props apokalyptik, boonebgorges, brettshumaker, DrewAPicture, MikeHansenMe, peterwilsoncc, whyisjake.
Fixes#34012.
Built from https://develop.svn.wordpress.org/trunk@51027
git-svn-id: http://core.svn.wordpress.org/trunk@50636 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The styles for the Privacy settings page were based on the Site Health section. These were duplicated into `edit.css` in #49264. This change merges the selectors from Site Health into the Privacy section, to reduce that duplicate code.
Props xkon, notlaura, clorith.
See #52429.
Built from https://develop.svn.wordpress.org/trunk@51025
git-svn-id: http://core.svn.wordpress.org/trunk@50634 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Adds a button to the media upload page to make copying the url possible on the same page when a media item upload is successful.
Props anotia, ryokuhi, Mista-Flo, lukecarbis, antpb, claytoncollie, shaunandrews, joedolson.
Fixes#51754.
Built from https://develop.svn.wordpress.org/trunk@51023
git-svn-id: http://core.svn.wordpress.org/trunk@50632 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This provides direct links to install and activate the plugin, if the user has the capabilities to do so, instead of just linking to plugin search results.
It also matches more closely the message about installing the Classic Editor plugin for meta boxes incompatible with the block editor.
Follow-up to [22855], [44280], [45657].
Props tw2113, peterwilsoncc, SergeyBiryukov.
Fixes#52669.
Built from https://develop.svn.wordpress.org/trunk@51011
git-svn-id: http://core.svn.wordpress.org/trunk@50620 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Adds an option to bulk delete menu items from the core Navigation Menus screen, offering a considerable usability benefit when making significant changes to navigation menus.
Uses the bulk select pattern found in post and media lists for consistency with other core management screens, rather than the rapid delete pattern found in menus in the customizer.
Props wphound, welcher, melchoyce, maxpertici, audrasjb
Fixes#21603.
Built from https://develop.svn.wordpress.org/trunk@51006
git-svn-id: http://core.svn.wordpress.org/trunk@50615 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This makes it easier to view the post on the front end of the site when moderating comments, without having to open the editor first.
Props trejder, audrasjb, vladytimy, lukecarbis, ayeshrajans, chaion07, paaljoachim, hareesh-pillai, SergeyBiryukov.
Fixes#52353.
Built from https://develop.svn.wordpress.org/trunk@50999
git-svn-id: http://core.svn.wordpress.org/trunk@50608 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Moves the widgets block editor from Gutenberg into WordPress Core.
- Adds @wordpress/edit-widgets, @wordpress/customize-widgets and
@wordpress/widgets.
- Modifies wp-admin/widgets.php to branch between the old editor and new editor
depending on wp_use_widgets_block_editor().
- Modifies WP_Customize_Widgets to branch between the old editor control and new
editor control depending on wp_use_widgets_block_editor().
Follows [50996] which was missing these files.
See #51506.
Props isabel_brison, TimothyBlynJacobs, andraganescu, kevin940726, talldanwp.
Built from https://develop.svn.wordpress.org/trunk@50997
git-svn-id: http://core.svn.wordpress.org/trunk@50606 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Moves the widgets block editor from Gutenberg into WordPress Core.
- Adds @wordpress/edit-widgets, @wordpress/customize-widgets and
@wordpress/widgets.
- Modifies wp-admin/widgets.php to branch between the old editor and new editor
depending on wp_use_widgets_block_editor().
- Modifies WP_Customize_Widgets to branch between the old editor control and new
editor control depending on wp_use_widgets_block_editor().
Fixes#51506.
Props isabel_brison, TimothyBlynJacobs, andraganescu, kevin940726, talldanwp.
Built from https://develop.svn.wordpress.org/trunk@50996
git-svn-id: http://core.svn.wordpress.org/trunk@50605 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The `update_user_option()` function is a way to update a user meta value after adding a blog’s prefix to the beginning of the meta key. But when the fourth parameter is `true`, the behavior is exactly the same as calling `update_user_meta()` directly.
This replaces all instances of `update_user_option()` when the fourth parameter is `true` in Core with a direct call to `update_user_meta()` to prevent an unnecessary call to `update_user_option()`.
Props johnjamesjacoby, zkancs, obenland, desrosj.
Fixes#43339.
Built from https://develop.svn.wordpress.org/trunk@50981
git-svn-id: http://core.svn.wordpress.org/trunk@50590 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This shows the parent theme name in a child theme's metadata section in the list table, in a similar way it is displayed in the theme details modal on the single site Themes screen.
Props dpik, Mista-Flo, seanchayes, poena, johnbillion, jeremyfelt, bradt, jacklenox, helen, Travel_girl, karmatosed, Presskopp, joyously, SergeyBiryukov.
Fixes#30240.
Built from https://develop.svn.wordpress.org/trunk@50978
git-svn-id: http://core.svn.wordpress.org/trunk@50587 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This reverts the changes to `id_base` from [50953] due to backward compatibility concerns, and instead focuses on the `id` and `class` attributes specifically.
With this change, any backslashes in the `id` or `class` attributes for a namespaced widget class are converted to underscores, making it easier to style the output or target the widget with JavaScript.
Follow-up to [50953].
Fixes#44098.
Built from https://develop.svn.wordpress.org/trunk@50961
git-svn-id: http://core.svn.wordpress.org/trunk@50570 1a063a9b-81f0-0310-95a4-ce76da25c4cd
It is going to be used on the new widgets editor screen. This patch also introduced a new class WP_Block_Editor_Context that is going to be used with revised block editor filters to let extenders to keep their existing behavior. It should also allow to provide more settings through the context class as new screens get introduced like the navigation editor.
Props azaozz, chrisvanpatten, timothyblynjacobs, youknowriad.
Fixes#52920.
Built from https://develop.svn.wordpress.org/trunk@50956
git-svn-id: http://core.svn.wordpress.org/trunk@50565 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This change fixes a false positive that would appear during scheduled events, by only running the REST test when a user visits the Site Health page, meaning an active session is available.
The test checking if the REST API is available, includes a parameter for `context=edit` to make sure the block editor can function properly. This means a user session with editor capabilities is required for the test to pass, which is not the case during a scheduled event.
Props szaqal21, TimothyBlynJacobs, hermpheus.
Fixes#52112.
Built from https://develop.svn.wordpress.org/trunk@50939
git-svn-id: http://core.svn.wordpress.org/trunk@50548 1a063a9b-81f0-0310-95a4-ce76da25c4cd
There are a few instances where two separate functions are used for both escaping and translating output. This change combines the two functions into the appropriate Core helper function.
Props dimadin, SergeyBiryukov.
Fixes#53153.
Built from https://develop.svn.wordpress.org/trunk@50931
git-svn-id: http://core.svn.wordpress.org/trunk@50540 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This allows third-party plugins to avoid accidentally being overwritten with an update of a plugin of a similar name from the WordPress.org Plugin Directory.
Additionally, introduce the `update_plugins_{$hostname}` filter, which third-party plugins can use to offer updates for a given hostname.
If set, the `Update URI` header field should be a URI and have a unique hostname.
Some examples include:
* `https://wordpress.org/plugins/example-plugin/`
* `https://example.com/my-plugin/`
* `my-custom-plugin-name`
`Update URI: false` also works, and unless there is code handling the `false` hostname, the plugin will never get an update notification.
If the header is present, the WordPress.org API will currently only return updates for the plugin if it matches the following format:
* `https://wordpress.org/plugins/{$slug}/`
* `w.org/plugin/{$slug}`
If the header has any other value, the API will not return a result and will ignore the plugin for update purposes.
Props dd32, DavidAnderson, meloniq, markjaquith, DrewAPicture, mweichert, design_dolphin, filosofo, sean212, nhuja, JeroenReumkens, infolu, dingdang, joyously, earnjam, williampatton, grapplerulrich, markparnell, apedog, afragen, miqrogroove, rmccue, crazycoders, jdgrimes, damonganto, joostdevalk, jorbin, georgestephanis, khromov, GeekStreetWP, jb510, Rarst, juliobox, Ipstenu, mikejolley, Otto42, gMagicScott, TJNowell, GaryJ, knutsp, mordauk, nvartolomei, aspexi, chriscct7, benoitchantre, ryno267, lev0, gregorlove, dougwollison, SergeyBiryukov.
See #14179, #23318, #32101.
Built from https://develop.svn.wordpress.org/trunk@50921
git-svn-id: http://core.svn.wordpress.org/trunk@50530 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When typing a password, the input field should use a monospace font. It's easier to distinguish letters in monospace fonts, which makes it easier to accurately read passwords.
Props robdxw, utz119, hedgefield, hareesh-pillai.
Fixes#40275.
Built from https://develop.svn.wordpress.org/trunk@50846
git-svn-id: http://core.svn.wordpress.org/trunk@50455 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This removes the left-side margin from the status text in the Site Health dashboard widget, which caused the text to be slightly indented, and not centered under the status indicator circle.
Follow-up to [50833].
See #52966.
Built from https://develop.svn.wordpress.org/trunk@50845
git-svn-id: http://core.svn.wordpress.org/trunk@50454 1a063a9b-81f0-0310-95a4-ce76da25c4cd
If the current server configuration doesn't allow WordPress to edit permalink settings, the textarea with new rules to use was not labeled. Add labels and aria-describedby pointing to the field description.
Props sabernhardt
Fixes#53142.
Built from https://develop.svn.wordpress.org/trunk@50830
git-svn-id: http://core.svn.wordpress.org/trunk@50439 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Replace infinitely autoloading behavior on scroll with a user-controlled load more button. Fix a long standing accessibility issue in the media library. Infinite scroll poses a wide range of problems for accessibility, usability, and performance.
This change modifies the library to load 40 items in the initial view, with a load more button to load the next 40 items and a button to move focus from the load more region to the first of the most recently added items.
The text for communicating the jump target was broadly discussed, agreeing that the text incorporated here would most concisely and clearly convey the purpose of the button, and any further detail is learnable from use.
Props afercia, adamsilverstein, joedolson, audrasjb, francina
Fixes#50105. See #40330.
Built from https://develop.svn.wordpress.org/trunk@50829
git-svn-id: http://core.svn.wordpress.org/trunk@50438 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This change introduces the `delete_theme` and `deleted_theme` action hooks, which fire immediately before and after an attempt to delete a theme, respectively.
Props scottconnerly, ptahdunbar, pbiron, vetyst, desrosj.
Fixes#16401.
Built from https://develop.svn.wordpress.org/trunk@50826
git-svn-id: http://core.svn.wordpress.org/trunk@50435 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This adds additional information to the Media Handling section of the Site Health Info page. When ImageMagick is used as the site’s image editor, a full list of file formats supported will now be shown. This will help site owners debug any issues they encounter as support for newer, more modern image formats is added (such as WebP in [50810]).
Additionally, the version of Imagick installed. This will help site owners debug issues with generating images on the PHP side.
Some variables have also been renamed to more accurately represent what is being stored.
Props Clorith, desrosj.
Fixes#53022.
Built from https://develop.svn.wordpress.org/trunk@50817
git-svn-id: http://core.svn.wordpress.org/trunk@50426 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes displayed in this tab were actually random, and have not been selected to be featured to new WordPress users.
The tab had already been removed from the Theme Directory, and with this change, the options in the admin area and in the directory will match again.
The "Popular" tab is now displayed instead as the default view.
Props poena, kjellr, celloexpressions.
Fixes#49487. See #meta5044.
Built from https://develop.svn.wordpress.org/trunk@50813
git-svn-id: http://core.svn.wordpress.org/trunk@50422 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add support for uploading, editing and saving WebP images when supported by the server.
Add 'image/webp' to supported mime types. Correctly identify WebP images and sizes even when PHP doesn't support WebP. Resize uploaded WebP files (when supported) and use for front end markup.
Props markoheijne, blobfolio, Clorith, joemcgill, atjn, desrosj, spacedmonkey, marylauc, mikeschroder, hellofromtonya, flixos90.
Fixes#35725.
Built from https://develop.svn.wordpress.org/trunk@50810
git-svn-id: http://core.svn.wordpress.org/trunk@50419 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This avoids accidentally overriding some variables in the scope of `activate_plugin()`, e.g. `$silent` or `$network_wide`.
Plugins expecting to have access to `$network_wide` directly on inclusion should receive it as an argument of the activation hook callback instead, on any of these actions:
* `activate_plugin`
* `activate_{$plugin}`
* `activated_plugin`
Follow-up to [28644].
Props Mike_Cowobo, dd32, DrewAPicture, mensmaximus, SergeyBiryukov.
Fixes#31104.
Built from https://develop.svn.wordpress.org/trunk@50787
git-svn-id: http://core.svn.wordpress.org/trunk@50396 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This officially removes support for Internet Explorer 11 in the CSS files run through the build process in Core.
Individual tickets should be opened for removing each manually maintained area of the code base targeting IE11.
The resulting changes to CSS files are included in this commit.
Fixes#53077.
Built from https://develop.svn.wordpress.org/trunk@50784
git-svn-id: http://core.svn.wordpress.org/trunk@50393 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This updates the `caniuse-lite` database to the most recent version (`1.0.30001214`) by running `npx browserslist@latest --update-db`.
The resulting changes after running `grunt precommit:css` are also included in this commit.
See #52624.
Built from https://develop.svn.wordpress.org/trunk@50782
git-svn-id: http://core.svn.wordpress.org/trunk@50391 1a063a9b-81f0-0310-95a4-ce76da25c4cd
There are several WordPress hooks defined on the server that depend on $post object that isn’t present on the new screens like edit site, edit widgets, or edit navigation. This patch deprecates existing filters and introduces replacements that are context-aware.
Props azaozz, andraganescu, jeremyfelt, nosolosw, youknowriad.
See #52920.
Built from https://develop.svn.wordpress.org/trunk@50776
git-svn-id: http://core.svn.wordpress.org/trunk@50385 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Prevent a `TypeError` from occurring during installation if `wp-config.php` is not writable. In PHP 8.0 this can cause a fatal error, in earlier versions of PHP a warning would be thrown.
Account for a change in type returned by `fopen()` coming in a future version of PHP. Minor coding standards fixes in the `/wp-admin/setup-config.php` file.
Props xknown, hellofromTonya, jrf, peterwilsoncc.
See #51423.
Built from https://develop.svn.wordpress.org/trunk@50775
git-svn-id: http://core.svn.wordpress.org/trunk@50384 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* `illegal_names`
* `limited_email_domains`
* `banned_email_domains`
If any of these options have a falsey value, treat it as an empty string. This addresses a PHP 8.1+ deprecation notice when passing a `null` value to `str_replace()`.
Additionally, avoid unnecessary type casting for better performance.
Props hellofromTonya, jrf, SergeyBiryukov.
See #51423.
Built from https://develop.svn.wordpress.org/trunk@50772
git-svn-id: http://core.svn.wordpress.org/trunk@50381 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The Site Health dashboard widget uses the same JavaScript file as the Site Health pages to generate its progress indicator.
This file was also set up to store the current Site Health check results if the current tab being shown isn't the debug information one, this had the side effect of the dashboard being seen as not the debug screen as well.
This now has a conditional making sure it's the status screen it self being displayed, before trying to do any Ajax requests.
Props arena.
Fixes#49814.
Built from https://develop.svn.wordpress.org/trunk@50766
git-svn-id: http://core.svn.wordpress.org/trunk@50375 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use `reset` to get the label from the first tab entry as the default if no tab is defined.
This ensures even if the tab order is changed, or tabs are removed, no warnings will be thrown.
Follow-up to [50764].
See #47225.
Built from https://develop.svn.wordpress.org/trunk@50765
git-svn-id: http://core.svn.wordpress.org/trunk@50374 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow developers to extend the Site Health screen with their own custom navigation tabs and pages.
This implements a new filter, `site_health_navigation_tabs`, which takes an associated array of tab identifiers/slugs, and tab labels, allowing developers to add their own subpage to the Site Health interface as new tabs.
To output a custom page, or add to an existing page, the `site_health_tab_content` action is triggered whenever the `tab` query argument is present and not empty. This action includes the current tab as its argument, which a developer would match against to only output content when relevant.
Props ramiy for initial patch.
Fixes#47225.
Built from https://develop.svn.wordpress.org/trunk@50764
git-svn-id: http://core.svn.wordpress.org/trunk@50373 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Previously, when exporting personal data, if the JSON encoding of the data failed, the invalid JSON was still written to `export.json`. This change captures the JSON encoding failure and adds a notice to the UI.
Props hellofromTonya, jrf, SergeyBiryukov.
Fixes#52892.
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