CSS content: property Screen reader compatibility

Last updated: September 5, 2016

Expected Result: causes problems in some screen readers

Actual Result: causes problems in 32 screen reader / browser combinations

For expected failures, the results show which AT combos the failures affect. Results are recorded from the user's viewpoint, so describe the user impact of authoring errors.

WCAG Failure: F87

Code used for this test:


        <style> a.important:after { content: ' Self Destruct - do not click' } </style>
        <a href='#' class='important'>Space Station</a>
    

Change History

Last updated: September 5, 2016

Screen readerBrowserModeNotesWhat the user hears
OK NVDA 2016.2FF48 Reading Speak Link, Space Station Self Destruct - do not click
OK NVDA 2016.2FF48 Tabbing Speak Space Station Self Destruct - do not click, link
Fail NVDA 2016.2IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail NVDA 2016.2IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
OK NVDA 2015.2FF41 Reading Speak Link, Space Station Self Destruct - do not click
OK NVDA 2015.2FF41 Tabbing Speak Space Station Self Destruct - do not click, link
Fail NVDA 2015.2IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail NVDA 2015.2IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
OK NVDA 2014.1FF29 Reading Speak Link, Space Station Self Destruct - do not click
OK NVDA 2014.1FF29 Tabbing Speak Space Station Self Destruct - do not click, link
Fail NVDA 2014.1IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail NVDA 2014.1IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
OK NVDA 2012.1FF29 Reading Speak Link, Space Station Self Destruct - do not click
OK NVDA 2012.1FF29 Tabbing Speak Space Station Self Destruct - do not click, link
Fail NVDA 2012.1IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail NVDA 2012.1IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
OK JAWS 17.0.2619FF48 Reading Speak Link, Space Station Self Destruct - do not click
OK JAWS 17.0.2619FF48 Tabbing Speak Space Station Self Destruct - do not click, link
Fail JAWS 17.0.2619IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail JAWS 17.0.2619IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
OK JAWS 16.0.4350FF41 Reading Speak Link, Space Station Self Destruct - do not click
OK JAWS 16.0.4350FF41 Tabbing Speak Space Station Self Destruct - do not click, link
Fail JAWS 16.0.4350IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail JAWS 16.0.4350IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
Fail JAWS 15.0.9023FF29 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail JAWS 15.0.9023FF29 TabbingText inserted by CSS content property not read. Speak Space Station, link
Fail JAWS 15.0.9023IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail JAWS 15.0.9023IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
Fail JAWS 14.0.9002FF29 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail JAWS 14.0.9002FF29 TabbingText inserted by CSS content property not read. Speak Space Station, link
Fail JAWS 14.0.9002IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail JAWS 14.0.9002IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
Fail JAWS 13.0.852FF29 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail JAWS 13.0.852IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
Fail WindowEyes 9.2IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail WindowEyes 9.2IE11 TabbingText inserted by CSS content property not read. Speak Link, Space Station
Fail WindowEyes 8.4IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail WindowEyes 8.4IE11 TabbingText inserted by CSS content property not read. Speak Link, Space Station
OK VoiceOver OSX 10.11Safari 9.1.2 Reading Speak Internal link, Space Station Self Destruct - do not click
OK VoiceOver OSX 10.11Safari 9.1.2 Tabbing Speak Internal link, Space Station Self Destruct - do not click
OK VoiceOver OSX 10.10Safari 9.0.1 Reading Speak Link, Space Station Self Destruct - do not click
OK VoiceOver OSX 10.10Safari 9.0.1 Tabbing Speak Link, Space Station Self Destruct - do not click
OK VoiceOver OSX 10.9Safari 7.0.3 Reading Speak Link, Space Station Self Destruct - do not click
OK VoiceOver OSX 10.9Safari 7.0.3 Tabbing Speak Link, Space Station Self Destruct - do not click
OK VoiceOver iOS 9.1Safari iOS 9.1Touch Speak Space Station Self Destruct - do not click, Link
OK VoiceOver iOS 8.4Safari iOS 8.4Touch Speak Space Station Self Destruct - do not click, Link
OK VoiceOver iOS 7.1Safari iOS 7.1Touch Speak Space Station Self Destruct - do not click, Link
Fail Dolphin SR 15.05IE11 ReadingText inserted by CSS content property not read. Speak Space Station, link
Fail Dolphin SR 15.05IE11 TabbingText inserted by CSS content property not read. Speak Space Station, link
Fail SaToGo 3.4.96.0IE11 ReadingText inserted by CSS content property not read. Speak Link, Space Station
Fail SaToGo 3.4.96.0IE11 TabbingText inserted by CSS content property not read. Speak Space Station, Link

SortSite rules: AccWcag2-F87-1

Test notes

The threshold for inclusion in these results is 5% usage in the most recent WebAIM screen reader survey. Chrome and Android still fall below the 5% threshold.

All tests were carried out with screen reader factory settings. JAWS in particular has a wide variety of settings controlling exactly what gets spoken.

Screen readers allow users to interact in different modes, and can produce very different results in each mode. The modes used in these tests are:

In the «What the user hears» column: