Issues

• Integrate PaintTimingMixin with Layout Instability API

  WICG/layout-instability#128 · Filter by author mmocny opened on Feb 24, 2026
  1

• Recent Input Exclusion should not exclude layout shifts from newly added elements

  WICG/layout-instability#127 · Filter by author yinhx3 opened on Feb 7, 2026
  3

• Should all values be exposed in CSS pixels or Physical Pixels?

  WICG/layout-instability#124 · Filter by author mmocny opened on Jul 11, 2025
  3

• HadRecentInput and Animation Frames: shifts painted together, should be ignored together.

  WICG/layout-instability#123 · Filter by author mmocny opened on Sep 18, 2024
  2

• Timeout on CLS evaluation

  WICG/layout-instability#120 · Filter by author MehseinJohan opened on Apr 20, 2023
  2

• Margin Collapsing can cause not-visible shifts to elements

  WICG/layout-instability#119 · Filter by author mmocny opened on Mar 31, 2023

• Clarify Input Exclusion and interactions across iframes

  WICG/layout-instability#118 · Filter by author mmocny opened on Mar 24, 2023

• Broken references in Layout Instability API

  WICG/layout-instability#116 · Filter by author dontcallmedom-bot opened on Dec 14, 2022

• The definition of DCLS and CLS (non-normative) should mention ignoring shifts with hadRecentInput: True

  WICG/layout-instability#113 · Filter by author mmocny opened on Jan 20, 2022

• Input Exclusion (lastInputTimestamp and hadRecentInput) should include certain interactions with Browser UI.

  WICG/layout-instability#110 · Filter by author mmocny opened on Oct 12, 2021
  1

• Resolve confusion from equal previous/current rects

  WICG/layout-instability#109 · Filter by author npm1 opened on Aug 23, 2021

• Explain expectations for content which shifts while fully obscured by other content (i.e. covered by a fixed position z-index overlay)

  WICG/layout-instability#108 · Filter by author mmocny opened on Aug 17, 2021

• Update CLS to window-based

  WICG/layout-instability#106 · Filter by author npm1 opened on Aug 4, 2021

• Consider excluding user-scroll + scroll-anchor in the same frame from being penalized

  WICG/layout-instability#90 · Filter by author vmpstr opened on Jan 21, 2021
  1

• exclude elements that transition from hidden to visible

  WICG/layout-instability#86 · Filter by author skobes-chromium opened on Dec 9, 2020
  4

• Layout shift reported without actual visual shifting for resized fixed iframe

  WICG/layout-instability#84 · Filter by author Andarist opened on Nov 5, 2020
  4

• Add an example computing CLS including iframe

  WICG/layout-instability#83 · Filter by author npm1 opened on Oct 8, 2020
  1

• Measuring Layout Instability / CLS from IFRAMEs

  WICG/layout-instability#80 · Filter by author nicjansma opened on Oct 5, 2020
  2

• CFC: adopt to WebPerfWG as a Working Draft

  WICG/layout-instability#68 · Filter by author yoavweiss opened on Aug 13, 2020

• Fix ambiguous language in section 2.2, "has not shifted in $X or $Y"

  WICG/layout-instability#67 · Filter by author dholbert opened on Aug 10, 2020
  4

  

• The spec should make it clearer whether transform affects "visual representation" and layout shift

  WICG/layout-instability#66 · Filter by author dholbert opened on Aug 10, 2020
  3

• The "move distance" metric imposes a strange penalty on extremely-offscreen content (depending on how far offscreen it was)

  WICG/layout-instability#62 · Filter by author dholbert opened on Aug 5, 2020
  22

• Specify expected behavior for overflows and containment

  WICG/layout-instability#60 · Filter by author wangxianzhu opened on Jul 24, 2020
  4

• Define how much data should be buffered (also: does 'buffered' impose a substantial cost on the whole web here?)

  WICG/layout-instability#52 · Filter by author dholbert opened on Jun 28, 2020
  17

• Ignore layout shifts due to user-initiated content dragging

  WICG/layout-instability#18 · Filter by author philipwalton opened on Jul 12, 2019
  2