fix(multiple): pass form field to error state tracker

src/material/chips/chip-grid.ts

@@ -30,6 +30,7 @@ import {
   NgForm,
   Validators,
 } from '@angular/forms';
+import {FORM_FIELD} from '@angular/forms/signals';
 import {_ErrorStateTracker, ErrorStateMatcher} from '../core';
 import {MatFormFieldControl} from '../form-field';
 import {merge, Observable, Subject} from 'rxjs';
@@ -258,14 +259,15 @@ export class MatChipGrid
     const parentForm = inject(NgForm, {optional: true});
     const parentFormGroup = inject(FormGroupDirective, {optional: true});
     const defaultErrorStateMatcher = inject(ErrorStateMatcher);
+    const formField = inject(FORM_FIELD, {optional: true, self: true});
 
     if (this.ngControl) {
       this.ngControl.valueAccessor = this;
     }
 
     this._errorStateTracker = new _ErrorStateTracker(
       defaultErrorStateMatcher,
-      this.ngControl,
+      formField || this.ngControl,
       parentFormGroup,
       parentForm,
       this.stateChanges,
@@ -492,7 +494,7 @@ export class MatChipGrid
     this.stateChanges.next();
   }
 
-   protected override _redirectDestroyedChipFocus() {
+  protected override _redirectDestroyedChipFocus() {
     if (this._lastDestroyedFocusedChipIndex === null) {
       return;
     }
@@ -501,8 +503,7 @@ export class MatChipGrid
 
     // If there are no chips left, or the set focuses the input,
     // clear the active item silently to prevent stale references.
-    if (!this._chips.length ||
-        (this._chips.length === 1 && this._chips.first.disabled)) {
+    if (!this._chips.length || (this._chips.length === 1 && this._chips.first.disabled)) {
       this._keyManager.updateActiveItem(-1);
     }
   }

src/material/core/common-behaviors/error-state.ts

@@ -57,31 +57,21 @@ export class _ErrorStateTracker {
   /** Updates the error state based on the provided error state matcher. */
   updateErrorState() {
     const oldState = this.errorState;
-    const matcher = this.matcher || this._defaultMatcher;
-    let newState: boolean;
-
-    if (this.formField) {
-      if (
-        (typeof ngDevMode === 'undefined' || ngDevMode) &&
-        matcher &&
-        !matcher.isSignalErrorState
-      ) {
-        throw new Error(
-          'Current error state matcher does not support signal forms. ' +
-            'Please implement the `isSignalErrorState` method.',
-        );
-      }
-
-      newState = matcher?.isSignalErrorState?.(this.formField.field()) ?? false;
-    } else {
-      const parent = this._parentFormGroup || this._parentForm;
-      const control = this.ngControl ? (this.ngControl.control as AbstractControl) : null;
-      newState = matcher?.isErrorState(control, parent) ?? false;
-    }
+    const newState = this._getCurrentErrorState(this.matcher || this._defaultMatcher);
 
     if (newState !== oldState) {
       this.errorState = newState;
       this._stateChanges.next();
     }
   }
+
+  private _getCurrentErrorState(matcher: ErrorStateMatcher | undefined): boolean {
+    if (this.formField && matcher?.isSignalErrorState) {
+      return matcher.isSignalErrorState(this.formField.field()) ?? false;
+    }
+
+    const parent = this._parentFormGroup || this._parentForm;
+    const control = this.ngControl ? (this.ngControl.control as AbstractControl) : null;
+    return matcher?.isErrorState(control, parent) ?? false;
+  }
 }

src/material/datepicker/date-range-input-parts.ts

@@ -30,6 +30,7 @@ import {
   ValidatorFn,
   Validators,
 } from '@angular/forms';
+import {FORM_FIELD} from '@angular/forms/signals';
 import {ErrorStateMatcher, _ErrorStateTracker} from '../core';
 import {_computeAriaAccessibleName} from './aria-accessible-name';
 import {DateRange, DateSelectionModelChange} from './date-selection-model';
@@ -103,6 +104,11 @@ abstract class MatDateRangeInputPartBase<D>
     // everything has been resolved.
     const ngControl = this._injector.get(NgControl, null, {optional: true, self: true});
 
+    this._errorStateTracker.formField = this._injector.get(FORM_FIELD, null, {
+      optional: true,
+      self: true,
+    });
+
     if (ngControl) {
       this.ngControl = ngControl;
       this._errorStateTracker.ngControl = ngControl;

src/material/input/input.ts

@@ -28,6 +28,7 @@ import {
 } from '@angular/core';
 import {_IdGenerator} from '@angular/cdk/a11y';
 import {FormGroupDirective, NgControl, NgForm, Validators} from '@angular/forms';
+import {FORM_FIELD} from '@angular/forms/signals';
 import {ErrorStateMatcher, _ErrorStateTracker} from '../core';
 import {MatFormFieldControl, MatFormField, MAT_FORM_FIELD} from '../form-field';
 import {Subject} from 'rxjs';
@@ -299,6 +300,7 @@ export class MatInput
     const parentFormGroup = inject(FormGroupDirective, {optional: true});
     const defaultErrorStateMatcher = inject(ErrorStateMatcher);
     const accessor = inject(MAT_INPUT_VALUE_ACCESSOR, {optional: true, self: true});
+    const formField = inject(FORM_FIELD, {optional: true, self: true});
 
     const element = this._elementRef.nativeElement;
     const nodeName = element.nodeName.toLowerCase();
@@ -331,7 +333,7 @@ export class MatInput
 
     this._errorStateTracker = new _ErrorStateTracker(
       defaultErrorStateMatcher,
-      this.ngControl,
+      formField || this.ngControl,
       parentFormGroup,
       parentForm,
       this.stateChanges,

src/material/select/select.ts

@@ -67,6 +67,7 @@ import {
   Validators,
 } from '@angular/forms';
 import {_getEventTarget} from '@angular/cdk/platform';
+import {FORM_FIELD} from '@angular/forms/signals';
 import {
   _animationsDisabled,
   _countGroupLabelsBeforeOption,
@@ -595,6 +596,7 @@ export class MatSelect
     const parentFormGroup = inject(FormGroupDirective, {optional: true});
     const tabIndex = inject(new HostAttributeToken('tabindex'), {optional: true});
     const defaultPopoverConfig = inject(OVERLAY_DEFAULT_CONFIG, {optional: true});
+    const formField = inject(FORM_FIELD, {optional: true, self: true});
 
     if (this.ngControl) {
       // Note: we provide the value accessor through here, instead of
@@ -610,7 +612,7 @@ export class MatSelect
 
     this._errorStateTracker = new _ErrorStateTracker(
       defaultErrorStateMatcher,
-      this.ngControl,
+      formField || this.ngControl,
       parentFormGroup,
       parentForm,
       this.stateChanges,