IMG with aria-describedby Screen reader compatibility

Last updated: October 16, 2016

Expected Result: causes problems in some screen readers

Actual Result: causes problems in 24 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.

Note: aria-describedby maps to the accessible description of an object, and is usually only read when a "Say Description" keyboard shortcut is pressed. This is different to the accessible name which is generated from alt / aria-label / aria-labelledby.

Code used for this test:


        <img src='1234.png' aria-describedby='img-aria-describedby-code'>
        <span id='img-aria-describedby-code'>this is an aria described by</span>
    

Change History

Last updated: October 16, 2016

Screen readerBrowserModeNotesWhat the user hears
Fail NVDA 2016.2FF48 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail NVDA 2016.2IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail NVDA 2015.2FF40 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail NVDA 2015.2IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail NVDA 2014.1FF28 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail NVDA 2014.1IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail NVDA 2012.1FF28 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail NVDA 2012.3IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 17.0.2619FF48 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 17.0.2619IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 16.0.4350FF40 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 16.0.4350IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 15.0.9023FF29 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 15.0.9023IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 14.0.9002FF29 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 14.0.9002IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 13.0.852FF29 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail JAWS 13.0.852IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
OK WindowEyes 9.2IE11 ReadingAnnounces the aria-describedby text as image name, and then when it appears in reading order This is an aria-describedby. This is an aria-describedby.
Fail WindowEyes 8.4IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
OK VoiceOver OSX 10.11Safari 9.1.2 Reading This is an aria-describedby, image
OK VoiceOver OSX 10.10Safari 9.0.1 Reading This is an aria-describedby, image
OK VoiceOver OSX 10.9Safari 7.0.3 Reading This is an aria described by, image
Fail VoiceOver iOS 9.1Safari iOS 9.1TouchReads out image filename, then aria-describedby. One thousand two hundred and thirty four PNG, image. This is an aria described by.
Fail VoiceOver iOS 8.4Safari iOS 8.4TouchReads out image filename, then aria-describedby. One thousand two hundred and thirty four PNG, image. This is an aria described by.
Fail VoiceOver iOS 7.1Safari iOS 7.1TouchReads out image filename, then aria-describedby. One thousand two hundred and thirty four, image. This is an aria described by.
Fail Dolphin SR 15.05IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order
Fail SaToGo 3.4.96.0IE11 ReadingImage ignored, but announces the aria-describedby text when it appears in reading order

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Test notes

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: