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fix(material/form-field): restore error message animation #31774

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fix(material/form-field): restore error message animation #31774

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30 changes: 12 additions & 18 deletions src/material/form-field/form-field.html
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Original file line number Diff line number Diff line change
Expand Up @@ -95,34 +95,28 @@
}
</div>

<div
class="mat-mdc-form-field-subscript-wrapper mat-mdc-form-field-bottom-align"
[class.mat-mdc-form-field-subscript-dynamic-size]="subscriptSizing === 'dynamic'"
<div aria-atomic="true" aria-live="polite"
class="mat-mdc-form-field-subscript-wrapper mat-mdc-form-field-bottom-align"
[class.mat-mdc-form-field-subscript-dynamic-size]="subscriptSizing === 'dynamic'"
>
@let subscriptMessageType = _getSubscriptMessageType();

<!--
Use a single permanent wrapper for both hints and errors so aria-live works correctly,
as having it appear post render will not consistently work. We also do not want to add
additional divs as it causes styling regressions.
-->
<div aria-atomic="true" aria-live="polite"
[class.mat-mdc-form-field-error-wrapper]="subscriptMessageType === 'error'"
[class.mat-mdc-form-field-hint-wrapper]="subscriptMessageType === 'hint'"
>
@switch (subscriptMessageType) {
@case ('error') {
@switch (subscriptMessageType) {
@case ('error') {
<div class="mat-mdc-form-field-error-wrapper">
<ng-content select="mat-error, [matError]"></ng-content>
}
</div>
}

@case ('hint') {
@case ('hint') {
<div class="mat-mdc-form-field-hint-wrapper">
@if (hintLabel) {
<mat-hint [id]="_hintLabelId">{{hintLabel}}</mat-hint>
}
<ng-content select="mat-hint:not([align='end'])"></ng-content>
<div class="mat-mdc-form-field-hint-spacer"></div>
<ng-content select="mat-hint[align='end']"></ng-content>
}
</div>
}
</div>
}
</div>