fix(accessor): ngModel conflits with nested inputs (#18976)

fixes #18248

angular/src/directives/control-value-accessors/boolean-value-accessor.ts

@@ -25,8 +25,8 @@ export class BooleanValueAccessor extends ValueAccessor {
     setIonicClasses(this.el);
   }
 
-  @HostListener('ionChange', ['$event.target.checked'])
-  _handleIonChange(value: any) {
-    this.handleChangeEvent(value);
+  @HostListener('ionChange', ['$event.target'])
+  _handleIonChange(el: any) {
+    this.handleChangeEvent(el, el.checked);
   }
 }

angular/src/directives/control-value-accessors/numeric-value-accesssor.ts

@@ -20,9 +20,9 @@ export class NumericValueAccessor extends ValueAccessor {
     super(el);
   }
 
-  @HostListener('ionChange', ['$event.target.value'])
-  _handleIonChange(value: any) {
-    this.handleChangeEvent(value);
+  @HostListener('ionChange', ['$event.target'])
+  _handleIonChange(el: any) {
+    this.handleChangeEvent(el, el.value);
   }
 
   registerOnChange(fn: (_: number | null) => void) {

angular/src/directives/control-value-accessors/radio-value-accessor.ts

@@ -20,8 +20,8 @@ export class RadioValueAccessor extends ValueAccessor {
     super(el);
   }
 
-  @HostListener('ionSelect', ['$event.target.checked'])
-  _handleIonSelect(value: any) {
-    this.handleChangeEvent(value);
+  @HostListener('ionSelect', ['$event.target'])
+  _handleIonSelect(el: any) {
+    this.handleChangeEvent(el, el.checked);
   }
 }

angular/src/directives/control-value-accessors/select-value-accessor.ts

@@ -20,8 +20,8 @@ export class SelectValueAccessor extends ValueAccessor {
     super(el);
   }
 
-  @HostListener('ionChange', ['$event.target.value'])
-  _handleChangeEvent(value: any) {
-    this.handleChangeEvent(value);
+  @HostListener('ionChange', ['$event.target'])
+  _handleChangeEvent(el: any) {
+    this.handleChangeEvent(el, el.value);
   }
 }

angular/src/directives/control-value-accessors/text-value-accessor.ts

@@ -20,8 +20,8 @@ export class TextValueAccessor extends ValueAccessor {
     super(el);
   }
 
-  @HostListener('ionChange', ['$event.target.value'])
-  _handleInputEvent(value: any) {
-    this.handleChangeEvent(value);
+  @HostListener('ionChange', ['$event.target'])
+  _handleInputEvent(el: any) {
+    this.handleChangeEvent(el, el.value);
   }
 }

angular/src/directives/control-value-accessors/value-accessor.ts

@@ -16,18 +16,22 @@ export class ValueAccessor implements ControlValueAccessor {
     setIonicClasses(this.el);
   }
 
-  handleChangeEvent(value: any) {
-    if (value !== this.lastValue) {
-      this.lastValue = value;
-      this.onChange(value);
+  handleChangeEvent(el: HTMLElement, value: any) {
+    if (el === this.el.nativeElement) {
+      if (value !== this.lastValue) {
+        this.lastValue = value;
+        this.onChange(value);
+      }
+      setIonicClasses(this.el);
     }
-    setIonicClasses(this.el);
   }
 
-  @HostListener('ionBlur')
-  _handleBlurEvent() {
-    this.onTouched();
-    setIonicClasses(this.el);
+  @HostListener('ionBlur', ['$event.target'])
+  _handleBlurEvent(el: any) {
+    if (el === this.el.nativeElement) {
+      this.onTouched();
+      setIonicClasses(this.el);
+    }
   }
 
   registerOnChange(fn: (value: any) => void) {

angular/test/test-app/e2e/src/inputs.e2e-spec.ts

@@ -60,4 +60,10 @@ describe('inputs', () => {
     expect(await element(by.css('#select-note')).getText()).toEqual('playstation');
     expect(await element(by.css('#range-note')).getText()).toEqual('20');
   });
+
+  it('nested components should not interfere with NgModel', async () => {
+    expect(await element(by.css('#range-note')).getText()).toEqual('10');
+    await element(by.css('#nested-toggle')).click();
+    expect(await element(by.css('#range-note')).getText()).toEqual('10');
+  });
 });

angular/test/test-app/src/app/inputs/inputs.component.html

@@ -93,7 +93,9 @@
 
     <ion-item color="dark">
       <ion-label>Range Mirror</ion-label>
-      <ion-range [(ngModel)]="range"></ion-range>
+      <ion-range [(ngModel)]="range">
+        <ion-toggle slot="start" id="nested-toggle" [(ngModel)]="toggle"></ion-toggle>
+      </ion-range>
       <ion-note slot="end">{{range}}</ion-note>
     </ion-item>