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fix(material/select): arrow not rendering correctly in high contrast mode #14219

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fix(material/select): arrow not rendering correctly in high contrast mode #14219

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crisbeto
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Since all borders get rendered out in high contrast mode, we can't use a CSS triangle to render out the mat-select dropdown arrow. These changes replace it with an SVG arrow.

Fixes #14207.

@crisbeto crisbeto added Accessibility This issue is related to accessibility (a11y) target: patch This PR is targeted for the next patch release labels Nov 20, 2018
@googlebot googlebot added the cla: yes PR author has agreed to Google's Contributor License Agreement label Nov 20, 2018
josephperrott
josephperrott approved these changes Nov 27, 2018
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LGTM

@josephperrott josephperrott added pr: lgtm action: merge The PR is ready for merge by the caretaker labels Nov 27, 2018
@jelbourn
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@crisbeto this causes the arrow to be in a slightly different position, causing a very large number of screenshot diffs. It would be way easier to merge if it was in exactly the same position.

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crisbeto commented Nov 28, 2018 •
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@jelbourn do we know what browsers it happens on? I was doing a manual screenshot diff as I was doing it and it looked identical.

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All the screenshot tests in Google are generally just taken with Chrome

@mmalerba mmalerba added aaa and removed aaa labels Apr 25, 2019
@andrewseguin andrewseguin added the P4 A relatively minor issue that is not relevant to core functions label May 30, 2019
@crisbeto crisbeto force-pushed the 14207/select-svg-arrow branch from 78d766e to fa48769 Compare June 20, 2019 21:07
@josephperrott josephperrott removed their assignment Oct 15, 2019
@mmalerba mmalerba removed the lgtm label Jul 31, 2020
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@crisbeto should we revisit this PR? I just checked this for the existing and MDC-based MatSelect and both render a little rectangle in place of the dropdown arrow.

@crisbeto crisbeto mentioned this pull request Dec 9, 2020
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Sorry for the delay @jelbourn, I somehow missed your previous message and I saw it now after revisiting this PR. I think that we should try it again, because we've had more reports about this being an issue. Should we trigger another presubmit to see if it's still a problem? I just tried it out again, and it still looks identical.

@crisbeto crisbeto added P3 An issue that is relevant to core functions, but does not impede progress. Important, but not urgent and removed P4 A relatively minor issue that is not relevant to core functions labels Jan 15, 2021
crisbeto added a commit to crisbeto/material2 that referenced this pull request Jan 15, 2021
@crisbeto
fix(material-experimental/mdc-select): arrow not rendering in high co…
f6aa10e 
…ntrast mode

The MDC select uses a CSS triangle for its down arrow which renders as a rectangle in
high contrast mode. These changes switch it to an SVG arrow.

These changes are identical to angular#14219 which had some trouble landing due to screenshot
diffs. The MDC select shouldn't have such issues.

Relates to angular#21263.
@crisbeto crisbeto mentioned this pull request Jan 15, 2021
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@crisbeto crisbeto changed the title fix(select): arrow not rendering correctly in high contrast mode fix(material/select): arrow not rendering correctly in high contrast mode Jan 15, 2021
@crisbeto crisbeto force-pushed the 14207/select-svg-arrow branch 2 times, most recently from ed0a833 to 4144b2e Compare January 19, 2021 21:37
@crisbeto
fix(material/select): arrow not rendering correctly in high contrast …
7609ba1 
…mode

Since all borders get rendered out in high contrast mode, we can't use a CSS triangle to
render out the `mat-select` dropdown arrow. These changes replace it with an SVG arrow.

Fixes angular#14207.
@crisbeto crisbeto force-pushed the 14207/select-svg-arrow branch from 4144b2e to 7609ba1 Compare January 19, 2021 21:47
@jelbourn
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sgtm, @andrewseguin we should get a fresh presubmit run for this

annieyw pushed a commit that referenced this pull request Mar 7, 2021
@crisbeto
fix(material-experimental/mdc-select): arrow not rendering in high co…
fef9179 
…ntrast mode (#21606)

The MDC select uses a CSS triangle for its down arrow which renders as a rectangle in
high contrast mode. These changes switch it to an SVG arrow.

These changes are identical to #14219 which had some trouble landing due to screenshot
diffs. The MDC select shouldn't have such issues.

Relates to #21263.
annieyw pushed a commit that referenced this pull request Mar 7, 2021
@crisbeto @annieyw
fix(material-experimental/mdc-select): arrow not rendering in high co…
0f333a2 
…ntrast mode (#21606)

The MDC select uses a CSS triangle for its down arrow which renders as a rectangle in
high contrast mode. These changes switch it to an SVG arrow.

These changes are identical to #14219 which had some trouble landing due to screenshot
diffs. The MDC select shouldn't have such issues.

Relates to #21263.

(cherry picked from commit fef9179)
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@crisbeto crisbeto mentioned this pull request Jun 10, 2021
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@andrewseguin andrewseguin added needs rebase and removed cla: yes PR author has agreed to Google's Contributor License Agreement labels Dec 29, 2021
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Closing, because this causes a large number of screenshot diffs internally and the issue has been fixed in the MDC version of the select.

@crisbeto crisbeto closed this Feb 26, 2022
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Accessibility This issue is related to accessibility (a11y) action: merge The PR is ready for merge by the caretaker P3 An issue that is relevant to core functions, but does not impede progress. Important, but not urgent target: patch This PR is targeted for the next patch release
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MatSelect: dropdown arrow renders as rectangle in high-contrast mode
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@crisbeto @jelbourn @josephperrott @googlebot @mmalerba @andrewseguin