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Layout Instability Monitoring

Category

Performance

Type

New or changed feature

Status

Enabled by default (Chrome 77)

Intent stage

Prepare to ship

• Breaking change: No
• Enterprise impact: None
• Spec maturity: Working draft
• Web Platform Tests: No

WPT details: https://wpt.fyi/results/layout-instability?label=experimental&label=master&aligned

Summary

Adds the LayoutShift interface to the Performance API, allowing developers to monitor changes to a DOM element's on-screen position.

Standards & signals

• Specification: https://wicg.github.io/layout-instability/
• Firefox: Positive
• Safari: No signal
• Web developers: Positive
• Tracking bug: http://crbug.com/912338

Ecosystem

• Web Platform Tests: https://wpt.fyi/results/?q=layout-instability
• Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
• GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
• chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+Layout%20Instability%20Monitoring
• MDN Web Docs: https://developer.mozilla.org/en-US/search?q=Layout%20Instability%20Monitoring
• Baseline status: https://webstatus.dev/?q=Layout%20Instability%20Monitoring

Docs: https://github.com/WICG/layout-instability/blob/master/README.md

Explainers: https://github.com/WICG/layout-instability

View on chromestatus.com