PowerMapper
PowerMapper
PDF image with blank (single space) alt text Screen reader compatibility
PDF
Sep 11, 2022
Expected Result: causes problems in some screen readers
Actual Result: causes problems in 40 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.
Code used for this test:
<a href='SR_PDF_blank_alt_text.pdf'>SR_PDF_blank_alt_text.pdf</a>
Change History
Last updated: September 11, 2022
- NVDA with Chrome
Causes problems from
NVDA 2018.4 to NVDA 2022.2
- NVDA with IE
Causes problems from
NVDA 2017.3 to NVDA 2019.2
- NVDA with FF
Causes problems from
NVDA 2018.4 to NVDA 2022.2
- JAWS with Chrome
Causes problems from
JAWS 2018.1811.2 to JAWS 2022.2207.25
- JAWS with IE
Causes problems from
JAWS 17.0.2007 to JAWS 2019.1912.1
- JAWS with FF
Causes problems from
JAWS 2018.1811.2 to JAWS 2022.2207.25
- VoiceOver macOS
Causes problems from
VoiceOver macOS 10.14 to VoiceOver macOS 12.5
- VoiceOver iOS
Causes problems from
VoiceOver iOS 12.4 to VoiceOver iOS 15.6
| Screen reader | Browser | Mode | Notes | What the user hears |
|---|---|---|---|---|
| NVDA 2022.2 | Chrome 105 | Reading | No description for graphic | Graphic, unlabeled graphic. |
| NVDA 2022.2 | FF102 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| NVDA 2022.2 | Edge 105 | Reading | Image ignored, no description for graphic | |
| NVDA 2021.2 | Chrome 94 | Reading | No description for graphic | Graphic, unlabeled graphic. |
| NVDA 2021.2 | FF91 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| NVDA 2021.2 | Edge 94 | Reading | No description for graphic | Graphic |
| NVDA 2020.2 | Chrome 86 | Reading | No description for graphic | Graphic, unlabeled graphic. |
| NVDA 2020.2 | FF78 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| NVDA 2020.2 | Edge 92 | Reading | No description for graphic | Graphic |
| NVDA 2019.2 | Chrome 79 | Reading | No description for graphic | Graphic, unlabeled graphic. |
| NVDA 2019.2 | FF68 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| NVDA 2019.2 | IE11 | Reading | No description for graphic | Graphic |
| NVDA 2018.4 | Chrome 73 | Reading | No description for graphic | Graphic, unlabeled graphic. |
| NVDA 2018.4 | FF60 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| NVDA 2018.4 | IE11 | Reading | No description for graphic | Graphic |
| NVDA 2017.3 | IE11 | Reading | No description for graphic | Graphic |
| JAWS 2022.2207.25 | Chrome 105 | Reading | No description for graphic | Unlabeled graphic. |
| JAWS 2022.2207.25 | FF102 | Reading | Unlabeled image read, Firefox accessibility inspector shows figure with blank name | Graphic |
| JAWS 2022.2207.25 | Edge 105 | Reading | No description for graphic | Space. |
| JAWS 2021.2107.12 | Chrome 94 | Reading | No description for graphic | Unlabeled graphic. |
| JAWS 2021.2107.12 | FF91 | Reading | Unlabeled image read, Firefox accessibility inspector shows figure with blank name | Graphic |
| JAWS 2021.2107.12 | Edge 94 | Reading | No description for graphic | Space. |
| JAWS 2020.2008.24 | Chrome 86 | Reading | No description for graphic | Unlabeled graphic, graphic. |
| JAWS 2020.2008.24 | FF78 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| JAWS 2020.2008.24 | Edge 92 | Reading | No description for graphic | Graphic. |
| JAWS 2019.1912.1 | Chrome 79 | Reading | No description for graphic | Unlabeled graphic, graphic. |
| JAWS 2019.1912.1 | FF68 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| JAWS 2019.1912.1 | IE11 | Reading | Image ignored | |
| JAWS 2018.1811.2 | Chrome 73 | Reading | No description for graphic | Unlabeled graphic. |
| JAWS 2018.1811.2 | FF60 | Reading | Image ignored - Firefox accessibility inspector shows no images in accessibility tree | |
| JAWS 2018.1811.2 | IE11 | Reading | Image ignored | |
| JAWS 17.0.2007 | IE11 | Reading | Image ignored | |
| VoiceOver macOS 12.5 | Safari 15.6 | Reading | No description of image | Space, image |
| VoiceOver macOS 11.5 | Safari 15.0 | Reading | No description of image | Space, image |
| VoiceOver macOS 10.15 | Safari 14.1 | Reading | No description of image | Space, image |
| VoiceOver macOS 10.14 | Safari 13.0 | Reading | No description of image | Space, image |
| VoiceOver iOS 15.6 | Safari iOS 15.6 | Touch | No description of image | Image |
| VoiceOver iOS 14.7 | Safari iOS 14.7 | Touch | No description of image | Image |
| VoiceOver iOS 13.3 | Safari iOS 13.3 | Touch | No description of image | Image, 1 of 1 |
| VoiceOver iOS 12.4 | Safari iOS 12.4 | Touch | No description of image | Image |
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