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This changeset implements the refined lazy-loading behavior outlined in https://make.wordpress.org/core/2021/07/15/refining-wordpress-cores-lazy-loading-implementation/ in order to improve the Largest Contentful Paint metric, which can see a regression from images or iframes above the fold being lazy-loaded. Adjusting this so far has been possible for developers via filters and still is, however this enhancement brings a more accurate behavior out of the box for the majority of themes. Specifically, this changeset skips the very first "content image or iframe" on the page from being lazy-loaded. "Content image or iframe" denotes any image or iframe that is found within content of any post in the current main query loop as well as any featured image of such a post. This applies both to "singular" as well as "archive" content: On a "singular" page the first image/iframe of the post is not lazy-loaded, while on an "archive" page the first image/iframe of the _first_ post in the query is not lazy-loaded. This approach refines the lazy-loading behavior correctly for the majority of themes, which use a single-column layout for post content. For themes with multi-column layouts, a new `wp_omit_loading_attr_threshold` filter can be used to change how many of the first images/iframes are being skipped from lazy-loaded (default is `1`). For example, a theme using a three-column grid of latest posts for archives could use the filter to override the threshold to `3` on archive pages, so that the first three content images/iframes would not be lazy-loaded. Props adamsilverstein, azaozz, flixos90, hellofromtonya, jonoaldersonwp, mte90, rviscomi, tweetythierry, westonruter. Fixes #53675. See #50425. git-svn-id: https://develop.svn.wordpress.org/trunk@52065 602fd350-edb4-49c9-b593-d223f7449a82 |
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| build.xml | ||
| multisite.xml | ||
| README.txt | ||
| wp-mail-real-test.php | ||
The short version:
1. Create a clean MySQL database and user. DO NOT USE AN EXISTING DATABASE or you will lose data, guaranteed.
2. Copy wp-tests-config-sample.php to wp-tests-config.php, edit it and include your database name/user/password.
3. $ svn up
4. Run the tests from the "trunk" directory:
To execute a particular test:
$ phpunit tests/phpunit/tests/test_case.php
To execute all tests:
$ phpunit
Notes:
Test cases live in the 'tests' subdirectory. All files in that directory will be included by default. Extend the WP_UnitTestCase class to ensure your test is run.
phpunit will initialize and install a (more or less) complete running copy of WordPress each time it is run. This makes it possible to run functional interface and module tests against a fully working database and codebase, as opposed to pure unit tests with mock objects and stubs. Pure unit tests may be used also, of course.
Changes to the test database will be rolled back as tests are finished, to ensure a clean start next time the tests are run.
phpunit is intended to run at the command line, not via a web server.