Method _updateDisabled

packages/forms/src/directives/ng_model.ts:432–446

(changes: SimpleChanges)

  }

  private _updateDisabled(changes: SimpleChanges) {
    const disabledValue = changes['isDisabled'].currentValue;
    // checking for 0 to avoid breaking change
    const isDisabled = disabledValue !== 0 && booleanAttribute(disabledValue);

    resolvedPromise.then(() => {
      if (isDisabled && !this.control.disabled) {
        this.control.disable();
      } else if (!isDisabled && this.control.disabled) {
        this.control.enable();
      }

      this._changeDetectorRef?.markForCheck();
    });
  }

  private _getPath(controlName: string): string[] {
    return this._parent ? controlPath(controlName, this._parent) : [controlName];