Deprecated across Chrome and Safari

Summary

A count of the number of APIs that were removed from A first and B last.
	Last removed from Chrome	Last removed from Safari
First removed from Chrome		12
First removed from Safari	4

A count of the number of APIs that were removed from A first and B last.

Last removed from Chrome

Last removed from Safari

First removed from Chrome

First removed from Safari

Average time for an API to be removed across Chrome and Safari

16 APIs took an average of 1799.80 days to be removed

API breakdown:

DOM API: 1461.98 days

CSS: 2080.76 days

HTML: 3154.43 days

JS: NaN days

Average time to landing by year of first deprecation

If a feature is deprecated in the earliest browser in 20XX it took Y days on average to become deprecated in the last browser (when considering Chrome and Safari). TTA (time to available).
	DOM API APIs	DOM API TTA	CSS APIs	CSS TTA	HTML APIs	HTML TTA	JS TTA
2014	1	4442.43	0	NaN	0	NaN	NaN
2015	1	3931.43	0	NaN	0	NaN	NaN
2017	0	NaN	1	3288.43	1	3154.43	NaN
2020	0	NaN	1	2314.43	0	NaN	NaN
2021	0	NaN	4	1720.43	0	NaN	NaN
2024	7	683.43	0	NaN	0	NaN	NaN

If a feature is deprecated in the earliest browser in 20XX it took Y days on average to become deprecated in the last browser (when considering Chrome and Safari). TTA (time to available).

DOM API APIs

DOM API TTA

CSS APIs

CSS TTA

HTML APIs

HTML TTA

JS APIs

JS TTA

2014

4442.43

NaN

2015

3931.43

NaN

2017

NaN

3288.43

3154.43

NaN

2020

NaN

2314.43

NaN

2021

NaN

1720.43

NaN

2024

683.43

NaN

Deprecated APIs

Below is a list of features that are deprecated in Chrome and Safari

Raw Data

DOM API Data

API	First Browser	Date	Last Browser	Date
api.MutationEvent	Chrome	7/23/2024	Safari	9/15/2025
api.MutationEvent.attrChange	Chrome	7/23/2024	Safari	9/15/2025
api.MutationEvent.attrName	Chrome	7/23/2024	Safari	9/15/2025
api.MutationEvent.initMutationEvent	Chrome	7/23/2024	Safari	9/15/2025
api.MutationEvent.newValue	Chrome	7/23/2024	Safari	9/15/2025
api.MutationEvent.prevValue	Chrome	7/23/2024	Safari	9/15/2025
api.MutationEvent.relatedNode	Chrome	7/23/2024	Safari	9/15/2025
api.SVGAnimateColorElement 📋	Chrome	4/8/2014	Safari	9/16/2024
api.SVGRenderingIntent 📋	Chrome	9/1/2015	Safari	3/5/2024

API

First Browser

Date

Last Browser

Date

Days

Notes

api.MutationEvent

Chrome

7/23/2024

Safari

9/15/2025

api.MutationEvent.attrChange

Chrome

7/23/2024

Safari

9/15/2025

api.MutationEvent.attrName

Chrome

7/23/2024

Safari

9/15/2025

api.MutationEvent.initMutationEvent

Chrome

7/23/2024

Safari

9/15/2025

api.MutationEvent.newValue

Chrome

7/23/2024

Safari

9/15/2025

api.MutationEvent.prevValue

Chrome

7/23/2024

Safari

9/15/2025

api.MutationEvent.relatedNode

Chrome

7/23/2024

Safari

9/15/2025

api.SVGAnimateColorElement 📋

Chrome

4/8/2014

Safari

9/16/2024

api.SVGRenderingIntent 📋

Chrome

9/1/2015

Safari

3/5/2024

CSS Data

API	First Browser	Date	Last Browser	Date	Notes
css.at-rules.media.prefers-color-scheme.no-preference	Chrome	2/4/2020	Safari	9/20/2021
css.properties.-webkit-mask-repeat-x	Safari	9/20/2021	Chrome	12/5/2023
css.properties.-webkit-mask-repeat-y	Safari	9/20/2021	Chrome	12/5/2023
css.properties.background-repeat-x 📋	Safari	9/20/2021	Chrome	12/5/2023	Safari: `CSS.supports('background-repeat-x')` returns `true`, but the property has no effect.Safari on iOS: `CSS.supports('background-repeat-x')` returns `true`, but the property has no effect.WebView on iOS: `CSS.supports('background-repeat-x')` returns `true`, but the property has no effect.
css.properties.background-repeat-y 📋	Safari	9/20/2021	Chrome	12/5/2023	Safari: `CSS.supports('background-repeat-y')` returns `true`, but the property has no effect.Safari on iOS: `CSS.supports('background-repeat-y')` returns `true`, but the property has no effect.WebView on iOS: `CSS.supports('background-repeat-y')` returns `true`, but the property has no effect.
css.properties.zoom.reset	Chrome	6/5/2017	Safari	3/31/2025

API

First Browser

Date

Last Browser

Date

Days

Notes

css.at-rules.media.prefers-color-scheme.no-preference

Chrome

2/4/2020

Safari

9/20/2021

css.properties.-webkit-mask-repeat-x

Safari

9/20/2021

Chrome

12/5/2023

css.properties.-webkit-mask-repeat-y

Safari

9/20/2021

Chrome

12/5/2023

css.properties.background-repeat-x 📋

Safari

9/20/2021

Chrome

12/5/2023

Safari: CSS.supports('background-repeat-x') returns true, but the property has no effect.Safari on iOS: CSS.supports('background-repeat-x') returns true, but the property has no effect.WebView on iOS: CSS.supports('background-repeat-x') returns true, but the property has no effect.

css.properties.background-repeat-y 📋

Safari

9/20/2021

Chrome

12/5/2023

Safari: CSS.supports('background-repeat-y') returns true, but the property has no effect.Safari on iOS: CSS.supports('background-repeat-y') returns true, but the property has no effect.WebView on iOS: CSS.supports('background-repeat-y') returns true, but the property has no effect.

css.properties.zoom.reset

Chrome

6/5/2017

Safari

3/31/2025

HTML Data

API	First Browser	Date	Last Browser	Date	Days	Notes
html.elements.object.codebase 📋	Chrome	10/17/2017	Safari	3/24/2020

API

First Browser

Date

Last Browser

Date

Days

Notes

html.elements.object.codebase 📋

Chrome

10/17/2017

Safari

3/24/2020