fix(material/select): don't announce selected value multiple times #24831
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mhaertwig
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Screen readers announce the selected value multiple times. NVDA e.g. reads "Favorite food Pizza Pizza combobox Pizza collapsed". 1. First, the Screen Reader (SR) reads the value of the label (see 1st `aria-labelledby`): "Favorite food" 2. SR reads the content of the combobox: "Pizza" 3. SR reads the value of the combobox (see 2nd `aria-labelledby`): "Pizza" 4. SR reads the content of the combobox again: "Pizza" To fix this, an `aria-hidden` attribute is added to the element containing the selected value. NVDA e.g. now reads "Favorite food Pizza combobox collapsed"
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The accessible name of the combobox shouldn't contain the dropdown value as well. This is not best practice. Same for the label tag, it's unnecessary since it only works for native html (select and input). The aria-owns lets the screen reader know that despite the element being lower on the DOM, it should be focused on it first before the element it owns. So this should be kept. My suggestion for the fix would be:
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josephperrott
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amysorto
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Screen readers announce the selected value multiple times. NVDA e.g. reads "Favorite food Pizza Pizza combobox Pizza collapsed".
aria-labelledby): "Favorite food"aria-ownsattribute): "Pizza"aria-labelledby): "Pizza"To fix this, an
aria-hiddenattribute is added to the element containing the selected value. NVDA e.g. now reads "Favorite food Pizza combobox collapsed".Successfully tested with NVDA, JAWS, Narrator and the Screen Reader Chrome plugin.
Closes #24899