ComboboxControl: use custom prefix when generating the instanceId #42134
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ciampo
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[Type] Bug
ciampo
commented
Jul 4, 2022
| @@ -287,3 +288,39 @@ _default.args = { | |||
| __next36pxDefaultSize: false, | |||
| allowReset: false, | |||
| }; | |||
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| export function TestDuplicateInstanceIds( args ) { | |||
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For test purposes only. I will remove this storybook example before merging
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Size Change: +3 B (0%) Total Size: 1.25 MB
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alexstine
approved these changes
Jul 4, 2022
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@ciampo LGTM.
The reason why I did not do this myself is I did not know if this would be against style guide naming convention to have a double component prefix before the instance ID. If you think it is fine, that is a simple enough fix for me.
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Thank you for the quick review!
There isn't a convention (at least that I'm aware of), especially since the Cc'ing @sarayourfriend (who may have some additional context on this function) and @mirka in case I'm missing anything here, before merging |
alexstine
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[Focus] Accessibility (a11y)
This reverts commit e832770c5db0cb4393d7169cc4141ac2553cb4d4.
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What?
Fixes #42112
Fixes a bug which caused different
inputelements to be assigned the sameidin case aComboboxControland aFormTokenFieldcomponents are rendered in the same page and are assigned the sameinstanceId.I initially wanted to add a unit test for this, but:
ComboboxControlhas no unit tests (😱)FormTokenField's tests are written withReact.TestUtils(which I never used before)...and so, for the sake of landing this fix quickly, I decided to skip unit tests.
Why?
Every ID assigned to an element in a page should be unique — non-unique IDs technically make the page's markup non-valid and can cause severe difficulties to users relying on assistive technology.
See #42112 (comment) for a more detailed explanation.
How?
In order to avoid the
TokenInputcomponent to receive the sameinstanceIdfrom bothComboboxControlandFormTokenField, theComboboxControlcomponent now passes a customprefixwhen callinguseInstanceId. This means that, while theids received byFormTokenFieldare simple numbers (1, 2, 3..), theids generated forComboboxControlwill all be prefixed (i.e.combobox-control-1,combobox-control-2,combobox-control-3...)Testing Instructions
Follow the instructions in #42112 's description, the bug should be not reproducible anymore.
Alternatively, I've added a temporary Storybook example:
npm run storybook:devand visit http://localhost:50240/?path=/story/components-comboboxcontrol--test-duplicate-instance-idsComboboxControlandFormTokenFieldreceive the sameinstanceIdinternally)inputelements rendered in the page, assess that they have differentidsFor completeness, undo the changes to
packages/components/src/combobox-control/index.jsintroduced from this PR, repeat the points above, and verify that the bug can be reproduced.Screenshots or screencast