| # Largest Contentful Paint Bug Fixes in M88 |
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| ## Bug Fixes in Chrome 88 |
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| In Chrome 88, some bug fixes were made in the chromium implementation. |
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| The bug fixes are: |
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| * Full viewport images, which are visually equivalent to background images, are |
| no longer considered as the largest contentful paint. |
| [Source code for this change](https://chromium-review.googlesource.com/c/chromium/src/+/2441732). |
| * Largest Contentful Paint stops recording after an input in an out of process |
| iframe. This change only affects Chrome's reporting of Largest Contentful |
| Paint in the [Chrome User Experience Report](https://developers.google.com/web/tools/chrome-user-experience-report), |
| as the API doesn't report iframe content to the main frame. |
| [Source code for this change](https://chromium-review.googlesource.com/c/chromium/src/+/2436770). |
| * Prior to Chrome 88, Largest Contentful Paint had a bug where it incorrectly |
| classified some images as invisible. This could happen in the case of |
| offscreen or tiny placeholder images which were replaced with large visible |
| images. The bug has been fixed, and the large visible images are now counted |
| as possible largest contentful paints. |
| [Source code for this change](https://chromium-review.googlesource.com/c/chromium/src/+/2561270). |
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| ## How does this affect a site's metrics? |
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| Each change only affects sites with specific types of content. |
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| The change to ignore full viewport images as potential largest contentful paints |
| will improve Largest Contentful Paint times for pages with background images. |
| This is intended as Largest Contentful Paint attempts to time when the main |
| content on the page is visible, and this generally is |
| [not background images](https://github.com/anniesullie/LCP_Examples/blob/master/body_background/README.md). |
| |
| The change to stop recording after an input in an out of process iframe will |
| improve Largest Contentful Paint times on sites which have cross-process iframes. |
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| The bug fix for invisible elements may result in increased Largest Contentful |
| Paint timings for sites using a placeholder pattern that swaps in the largest |
| contentful image. |
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| ## When were users affected? |
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| Chrome 88 is currently scheduled to be released the week of January 19, 2021. |
