Deprecated

For a given set of browsers, what APIs are removed in all of them how many days it take for the API to removed in the first browser to the last.

Example Comparisons
Browsers
Features

Summary

A count of the number of APIs that were removed from A first and B last.
Last removed from ChromeLast removed from Safari
First removed from Chrome 1
First removed from Safari 2

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

3 APIs took an average of 1975.17 days to be removed

API breakdown:

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).
CSS APIsCSS TTA
2020 12371.17
2021 21777.17

Deprecated APIs

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

Raw Data

Quick Links:

CSS Data

API First Browser Date Last Browser Date Days Notes
css.at-rules.media.prefers-color-scheme.no-preference Chrome2/4/2020 Safari9/20/2021
css.properties.-webkit-mask-repeat-x Safari9/20/2021 Chrome12/5/2023
css.properties.-webkit-mask-repeat-y Safari9/20/2021 Chrome12/5/2023