fix(material/slider): some screen readers announcing long decimal values - #20721
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It looks like some screen readers announce the value of a slider by calculating the percentage themselves using the `aria-valuemin`, `aria-valuemax` and `aria-valuenow`. The problem is that they don't round down the decimals so for a slider between 0 and 1 with a step of 0.1, they end up reading out values like 0.20000068. These changes work around the issue by setting `aria-valuetext` to the same value that we shown in the thumb which we truncate ourselves. Fixes angular#20719.
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…ues (#20721) It looks like some screen readers announce the value of a slider by calculating the percentage themselves using the `aria-valuemin`, `aria-valuemax` and `aria-valuenow`. The problem is that they don't round down the decimals so for a slider between 0 and 1 with a step of 0.1, they end up reading out values like 0.20000068. These changes work around the issue by setting `aria-valuetext` to the same value that we shown in the thumb which we truncate ourselves. Fixes #20719. (cherry picked from commit d93e16f)
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@crisbeto I had to revert this change because it overrides custom aria-values |
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No problem, I hadn't accounted for that. I'll resubmit it. |
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It looks like some screen readers announce the value of a slider by calculating the percentage themselves using the
aria-valuemin,aria-valuemaxandaria-valuenow. The problem is that they don't round down the decimals so for a slider between 0 and 1 with a step of 0.1, they end up reading out values like 0.20000068. These changes work around the issue by settingaria-valuetextto the same value that we shown in the thumb which we truncate ourselves.Fixes #20719.