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## Overview
Originally [introduced in WordPress 4.4](https://make.wordpress.org/core/2015/11/10/responsive-images-in-wordpress-4-4/), at the time WordPress had almost no way of knowing the intended l…
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### Description
#39497 introduced a workaround for the bugs described in https://core.trac.wordpress.org/ticket/55628 and https://core.trac.wordpress.org/ticket/6195
Unfortunately, this workaround…
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## Feature Description
If an image is visible in one breakpoint but not another, it should be loaded conditionally. If an image lacks `loading=lazy`, however, it is loaded unconditionally. Neverthe…
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When I run `npm run format-js` it ends up formatting more files than I expected:
```
$ npm run format-js
> format-js
> wp-scripts format
.eslintrc.js 29ms
.github/dependabot.yml 20ms
.github/workfl…
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### Prerequisites
- [ ] I have carried out troubleshooting steps and I believe I have found a bug.
- [ ] I have searched for similar bugs in both open and closed issues and cannot find a duplicate.
…
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| Item | Tool | Speedup |
| ----------------------------- | ---------------------------------- | -------------------------…
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Hello MonsterInsights Team!
I have been working on the WordPress core performance team helping research performance issues in by investigating blocking script usage that could leverage the [new c…
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- Part of #41236.
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[In WordPress 6.6](https://github.com/WordPress/gutenberg/issues/60219), work was done to improve warnings integration with Preact DevTools, as well as adding directives for as…
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## What problem does this address?
Currently, WordPress enforces a strict separation between themes and plugins, where themes are meant to handle design and layout, while functionality, especially in…
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From WordPress 6.5 ahead, we should register our block variations PHP side, as mentioned here:
https://make.wordpress.org/core/2024/02/29/performance-improvements-for-registering-block-variations-with…