| # Cumulative Layout Shift Changelog |
| |
| This is a list of changes to [Cumulative Layout Shift](https://web.dev/cls). |
| |
| * Chrome 118 |
| * Implementation optimizations: [Image loading prioritizations](2023_10_image_loading_optimizations.md) |
| * Chrome 116 |
| * Implementation optimizations: [Optimizing image load scheduling](2023_08_image_loading.md) |
| * Chrome 98 |
| * Metric definition improvement: [Record CLS value at the first OnHidden in addition to tab close in UKM](2021_11_cls.md) |
| * Chrome 97 |
| * Implementation optimizations: [BFCache](2022_01_bfcache.md) |
| * Chrome 93 |
| * Metric definition improvement: [Bug fix involving scroll anchoring](2021_06_cls_2.md) |
| * Metric definition improvement: [Ignore layout shift while dragging or resizing elements with a mouse](2021_06_cls_2.md) |
| * Chrome 91 |
| * Metric definition improvement: [Cumulative Layout Shift uses max session window](2021_06_cls.md) |
| * Chrome 90 |
| * Metric definition improvement: [Bug fixes involving changes to transform, effect, clip or position](2021_02_cls.md) |
| * Metric definition improvement: [Consider transform change countering layout shift](2021_02_cls.md) |
| * Metric definition improvement: [Ignore layout shift for more invisible elements](2021_02_cls.md) |
| * Metric definition improvement: [Ignore inline direction shift moving from/to out of view](2021_02_cls.md) |
| * Metric definition improvement: [Improvement for shift with counterscroll](2021_02_cls.md) |
| * Chrome 89 |
| * Metric definition improvement: [Ignore layout shift under opacity:0](2020_12_cls.md) |
| * Metric definition improvement: [Clip layout shift rect by visual viewport](2020_12_cls.md) |
| * Chrome 88 |
| * Metric definition improvement: [Cumulative layout shift properly detects shifts of fixed position elements](2020_11_cls.md) |
| * Metric definition improvement: [Cumulative layout shift properly detects shifts of descendents of a sticky element](2020_11_cls.md) |
| * Metric definition improvement: [no penalty for content-visibility: auto content](2020_11_cls.md) |
| * Metric definition improvement: [Ignore layout shift when visibility:hidden becomes visible](2020_11_cls.md) |
| * Chrome 87 |
| * Metric definition improvement: [Fix problem in Cumulative Layout shift calculation of impact region](2020_10_cls_2.md) |
| * Metric definition improvement: [Cumulative Layout Shift properly handles clipping of elements styled contain:paint](2020_10_cls_2.md) |
| * Chrome 86 |
| * Metric definition changes and bug: [Cumulative Layout Shift score changes and regressions in impact region calculation](2020_10_cls.md) |
| * Chrome 85 |
| * Metric definition improvement: [Cumulative Layout Shift ignores layout shifts from video slider thumb](2020_06_cls.md) |
| * Chrome 79 |
| * Metric is elevated to stable; changes in metric definition will be reported in this log. |
| * Chrome 77 |
| * Metric exposed via API: [Cumulative Layout Shift](https://web.dev/cls/) available via [Layout Instability API](https://github.com/WICG/layout-instability) |
