Platform/Layout/CSS Compatibility
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Here's a summary of the data collection and analysis that has been conducted regarding the use of various CSS vendor-specific prefixes.
The current datasets, collected by John Jensen, are:
Initial CSS properties dataset
- Completed in November 2011
- Summary of 88,000 CSS files from top 30,000 sites on the web, collected using Desktop FF 8.0 User-Agent
- Tables and summary reports in https://bugzilla.mozilla.org/show_bug.cgi?id=708406
- Written report and summary tables are attached to the ticket.
- Summary file, in CSV format, is 620MB compressed, 7.2GB uncompressed, available at http://analysis.net/moz/css.csv.gz
Q&A
- how many sites in your mobile Webkit browser crawl use at least one of 'transition', 'transition-timing-function', 'transition-duration', 'transition-property', 'transition-delay' (ignoring prefixes)?
1245 / 30087 = 4.13%
- how many use them only with -webkit prefixes (no -moz or unprefixed versions of the properties)?
336 / 30087 = 1.12%
- how many use them only with -webkit prefixes and unprefixed (no -moz versions of the properties)?
365 / 30087 = 1.21%
- For each CSS prefix for which there are both -moz- and -webkit- prefixes, what percentage of domains host CSS that uses only the -webkit- version and not the -moz- or unprefixed version?
|text-size-adjust||510| |box-shadow||428| |border-radius||412| |appearance||379| |font-smoothing||285| |tap-highlight-color||250| |transform||75| |border-top-left-radius||72| |border-top-right-radius||72| |transition-duration||61| |animation-duration||56| |animation-name||56| |border-bottom-left-radius||55| |border-bottom-right-radius||55| |transition-property||49| |animation-iteration-count||45| |padding-start||45| |background-size||43| |animation-timing-function||42| |box-sizing||42|
Larger, as-yet-unprocessed datasets
- Raw data downloading completed in mid-January 2012, using these UAs:
- latest Android Native Browser from ICS
- latest Mobile Safari UA
- Includes all HTML, Javascript, CSS files in compressed format
- Roughly 1.1m files downloaded for each UA
- CSS file parsing is underway to produce more data