From 8540e05da0d5d7337094ef9a2b1da66c02dea24a Mon Sep 17 00:00:00 2001
From: Chris Bubernak <chris.bubernak@gmail.com>
Date: Wed, 17 Feb 2021 09:23:53 -0800
Subject: [PATCH] add aria-atomic

---
 src/material-experimental/mdc-form-field/directives/error.ts | 1 +
 src/material/form-field/error.ts                             | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/material-experimental/mdc-form-field/directives/error.ts b/src/material-experimental/mdc-form-field/directives/error.ts
index 0c466cb60b31..e00b1a7e339a 100644
--- a/src/material-experimental/mdc-form-field/directives/error.ts
+++ b/src/material-experimental/mdc-form-field/directives/error.ts
@@ -22,6 +22,7 @@ export const MAT_ERROR = new InjectionToken<MatError>('MatError');
   selector: 'mat-error',
   host: {
     'class': 'mat-mdc-form-field-error mat-mdc-form-field-bottom-align',
+    'aria-atomic': 'true',
     '[attr.aria-live]': 'ariaLive',
     '[id]': 'id',
   },
diff --git a/src/material/form-field/error.ts b/src/material/form-field/error.ts
index 344fda9be0b9..3c3ce1e8cae4 100644
--- a/src/material/form-field/error.ts
+++ b/src/material/form-field/error.ts
@@ -23,6 +23,7 @@ export const MAT_ERROR = new InjectionToken<MatError>('MatError');
   host: {
     'class': 'mat-error',
     '[attr.id]': 'id',
+    'aria-atomic': 'true',
     '[attr.aria-live]': 'ariaLive',
   },
   providers: [{provide: MAT_ERROR, useExisting: MatError}],