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object with alt attribute Screen reader compatibility

HTML
Dec 12, 2023

Expected Result: causes problems in some screen readers

Actual Result: causes problems in 52 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.

Browsers stopped displaying Flash content when Flash reached end-of-life in December 2020.

alt is not a valid HTML attribute on object elements.

Code used for this test:


		<object alt='Alt text for object' data='startstop_movieclips.swf' type='application/x-shockwave-flash'>
		</object>

Change History

Last updated: December 12, 2023

  • Better NVDA with Chrome Better - caused problems in NVDA 2019.2, but now OK in NVDA 2023.3
  • Bad NVDA with IE Causes problems from NVDA 2015.2 to NVDA 2019.2
  • Better NVDA with FF Better - caused problems in NVDA 2019.2, but now OK in NVDA 2023.3
  • Bad JAWS with Chrome Causes problems from JAWS 2018.1811.2 to JAWS 2023.2311.34
  • Bad JAWS with IE Causes problems from JAWS 13.0.852 to JAWS 2019.1912.1
  • Better JAWS with FF Better - caused problems in JAWS 2019.1912.1, but now OK in JAWS 2023.2311.34
  • Better VoiceOver macOS Better - caused problems in VoiceOver macOS 10.14, but now OK in VoiceOver macOS 13.6
  • Better VoiceOver iOS Better - caused problems in VoiceOver iOS 14.7, but now OK in VoiceOver iOS 16.6
  • Bad WindowEyes with IE Causes problems from WindowEyes 8.4 to WindowEyes 9.2
  • Bad Dolphin with IE Causes problems in Dolphin SR 15.05
  • Bad SaToGo with IE Causes problems in SaToGo 3.4.96.0
Screen readerBrowserModeNotesWhat the user hears
OK NVDA 2023.3Chrome 120 Reading Screen says 'Adobe Flash Player is no longer supported' Embedded object unavailable.
OK NVDA 2023.3FF 115 Reading Nothing displayed on screen and nothing voiced for object
OK NVDA 2023.3Edge 120 Reading Screen says 'This plug-in isn't supported' Embedded object unavailable.
OK NVDA 2022.2Chrome 105 Reading Screen says 'Adobe Flash Player is no longer supported' Embedded object unavailable.
OK NVDA 2022.2FF 102 Reading Nothing displayed on screen and nothing voiced for object
OK NVDA 2022.2Edge 105 Reading Screen says 'This plug-in isn't supported' Embedded object unavailable.
OK NVDA 2021.2Chrome 94 Reading Screen says 'This plug-in isn't supported' Embedded object unavailable.
OK NVDA 2021.2FF 91 Reading Nothing displayed on screen and nothing voiced for object
OK NVDA 2021.2Edge 94 Reading Screen says 'This plug-in isn't supported' Embedded object unavailable.
OK NVDA 2020.2Chrome 86 Reading Screen says 'This plug-in isn't supported' Embedded object unavailable.
OK NVDA 2020.2FF 78 Reading Nothing displayed on screen and nothing voiced for object
OK NVDA 2020.2Edge 92 Reading Screen says 'This plug-in isn't supported' Embedded object unavailable.
Fail NVDA 2019.2Chrome 79 Reading No description of non-text content. Embedded object.
Fail NVDA 2019.2FF 68 Reading Unlabeled buttons, and no description of non-text content. Clickable button. Button, hide plugin. Blank.
Fail NVDA 2019.2IE11 Reading ALT not read, no indication of content Embedded object
Fail NVDA 2018.4Chrome 73 Reading No description of non-text content. Embedded object.
Fail NVDA 2018.4FF 60 Reading Unlabeled buttons, and no description of non-text content. Clickable button. Button, hide plugin. Blank.
Fail NVDA 2018.4IE11 Reading ALT not read, no indication of content Embedded object
Fail NVDA 2017.3FF 60 Reading No description voiced for object Embedded object unavailable
Fail NVDA 2017.3IE11 Reading ALT not read, no indication of content Embedded object
Fail NVDA 2016.2FF 48 Reading Nothing voiced for object - no indication it exists Blank
Fail NVDA 2016.2IE11 Reading ALT not read, no indication of content Embedded object
Fail NVDA 2015.2FF 38 Reading Nothing voiced for object - no indication it exists Blank
Fail NVDA 2015.2IE11 Reading ALT not read, no indication of content Embedded object
Fail JAWS 2023.2311.34Chrome 120 Reading Screen says 'Adobe Flash Player is no longer supported', but nothing voiced for object - no indication it exists
OK JAWS 2023.2311.34FF 115 Reading Nothing displayed on screen and nothing voiced for object
Fail JAWS 2023.2311.34Edge 120 Reading Screen says 'This plug-in isn't supported', but nothing voiced for object - no indication it exists
Fail JAWS 2022.2207.25Chrome 105 Reading Screen says 'Adobe Flash Player is no longer supported', but nothing voiced for object - no indication it exists
OK JAWS 2022.2207.25FF 102 Reading Nothing displayed on screen and nothing voiced for object
Fail JAWS 2022.2207.25Edge 105 Reading Screen says 'This plug-in isn't supported', but nothing voiced for object - no indication it exists
Fail JAWS 2021.2107.12Chrome 94 Reading Screen says 'Adobe Flash Player is no longer supported', but nothing voiced for object - no indication it exists
OK JAWS 2021.2107.12FF 91 Reading Nothing displayed on screen and nothing voiced for object
Fail JAWS 2021.2107.12Edge 94 Reading Screen says 'This plug-in isn't supported', but nothing voiced for object - no indication it exists
Fail JAWS 2020.2008.24Chrome 86 Reading Screen says 'This plug-in isn't supported', but nothing voiced for object - no indication it exists
OK JAWS 2020.2008.24FF 78 Reading Nothing displayed on screen and nothing voiced for object
Fail JAWS 2020.2008.24Edge 92 Reading Screen says 'This plug-in isn't supported', but nothing voiced for object - no indication it exists
Fail JAWS 2019.1912.1Chrome 79 Reading Nothing voiced for object displayed on screen - no indication it exists
Fail JAWS 2019.1912.1FF 68 Reading Unlabeled buttons, and no description of non-text content. Unlabeled zero button. Hide plugin button.
Fail JAWS 2019.1912.1IE11 Reading No description of non-text content Start button. Stop button.
Fail JAWS 2018.1811.2Chrome 73 Reading Nothing voiced for object - no indication it exists
Fail JAWS 2018.1811.2FF 60 Reading Unlabeled buttons, and no description of non-text content. Unlabeled zero button. Hide plugin button.
Fail JAWS 2018.1811.2IE11 Reading No description of non-text content Start button. Stop button.
Fail JAWS 18.0.5038FF 52 Reading Nothing voiced for object - no indication it exists
Fail JAWS 18.0.5038IE11 Reading No description of non-text content Flash start. Start button. Stop button. Flash end.
Fail JAWS 17.0.2619FF 48 Reading Nothing voiced for object - no indication it exists
Fail JAWS 17.0.2619IE11 Reading No description of non-text content Flash start. Start button. Stop button. Flash end.
Fail JAWS 16.0.4350FF 41 Reading Nothing voiced for object - no indication it exists
Fail JAWS 16.0.4350IE11 Reading No description of non-text content Flash start. Start button. Stop button. Flash end.
Fail JAWS 15.0.9023FF 38 Reading Nothing voiced for object - no indication it exists
Fail JAWS 15.0.9023IE11 Reading No description of non-text content Flash start. Start button. Stop button. Flash end.
OK JAWS 14.0.9002FF 38 Reading Flash start. Alt text for object button. Flash end.
Fail JAWS 14.0.9002IE11 Reading No description of non-text content Flash start. Start button. Stop button. Flash end.
OK JAWS 13.0.852FF 38 Reading Flash start. Alt text for object button. Flash end.
Fail JAWS 13.0.852IE11 Reading No description of non-text content Flash start. Start button. Stop button. Flash end.
Fail WindowEyes 9.2IE11 Reading Nothing voiced for object - no indication it exists
Fail WindowEyes 8.4IE11 Reading ALT not read, no description of non-text content Start button. Stop button.
OK VoiceOver macOS 13.6Safari 16.6 Reading Nothing displayed on screen and nothing voiced for object
OK VoiceOver macOS 12.5Safari 15.6 Reading Nothing displayed on screen and nothing voiced for object
OK VoiceOver macOS 11.5Safari 15.0 Reading Nothing displayed on screen and nothing voiced for object
OK VoiceOver macOS 10.15Safari 14.1 Reading Nothing displayed on screen and nothing voiced for object
Fail VoiceOver macOS 10.14Safari 13.0 Reading Nothing voiced for object - no indication it exists
Fail VoiceOver macOS 10.13Safari 12.1 Reading Nothing voiced for object - no indication it exists
Fail VoiceOver macOS 10.12Safari 10.1.2 Reading Nothing voiced for object - no indication it exists
Fail VoiceOver macOS 10.11Safari 9.1.2 Reading Nothing voiced for object - no indication it exists
Fail VoiceOver macOS 10.10Safari 8.0.6 Reading Nothing voiced for object - no indication it exists Newline
OK VoiceOver iOS 16.6Safari iOS 16.6Touch Alt text for object
OK VoiceOver iOS 15.6Safari iOS 15.6Touch Alt text for object
Fail VoiceOver iOS 14.7Safari iOS 14.7TouchNothing voiced for object - no indication it exists
Fail VoiceOver iOS 13.3Safari iOS 13.3TouchNothing voiced for object - no indication it exists
Fail VoiceOver iOS 12.4Safari iOS 12.4TouchNothing voiced for object - no indication it exists
Fail VoiceOver iOS 11.4Safari iOS 11.4TouchNothing voiced for object - no indication it exists
Fail VoiceOver iOS 10.3Safari iOS 10.3TouchNothing voiced for object - no indication it exists
Fail VoiceOver iOS 9.1Safari iOS 9.1TouchNothing voiced for object - no indication it exists
Fail VoiceOver iOS 8.3Safari iOS 8.3TouchNothing voiced for object - no indication it exists
Fail Dolphin SR 15.05IE11 Reading No description of non-text content Object, normal, start button. Stop button.
Fail SaToGo 3.4.96.0IE11 Reading No description of non-text content Start of Flash Player. Button, start. Button, stop. End of Flash player.

SortSite rules: AccHtmlObjectNoAccName AccHtmlTimedMediaPlaceholder

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:

  • Reading Content read using the “read next” command in a screen reader
  • Tabbing Content read using the “tab” key in a screen reader
  • Heading Content read using the “next heading” key in a screen reader
  • Touch Content read when touching an area of screen on a mobile device

In the “What the user hears” column:

  • Commas represent short pauses in screen reader voicing
  • Full Stops represent places where voicing stops, and the “read next” or “tab” or “next heading” command is pressed again
  • Ellipsis … represent a long pause in voicing
  • (Brackets) represent voicing that requires a keystroke to hear