wrong type for formState

[its-dibo]

FormlyFormOptions.formState is defined as any, means it can accept any arbitrary value.
also, the docs says

The formState property is passed to all fields and is a mechanism for communicating between fields (without having to mess with your model).
which also means it holds arbitrary value that doesn't mean anything to firmly

but when you pass formStatus.disabled=true it disables the form, which means it has been interpreted by Formly, which is not implied neither by the type definition nor the documentation.

export interface FormlyFormOptions {
    updateInitialValue?: (model?: any) => void;
    resetModel?: (model?: any) => void;
    formState?: any;
    fieldChanges?: Subject<FormlyValueChangeEvent>;
    showError?: (field: FieldType) => boolean;
    build?: (field?: FormlyFieldConfig) => FormlyFieldConfig;
    checkExpressions?: (field: FormlyFieldConfig) => void;
    detectChanges?: (field: FormlyFieldConfig) => void;
    parentForm?: FormGroupDirective | null;
}

it should be changed to

formStats: {
  disabled: boolean 
  // other props that are used by Formly
 [key:string]: any
}

[aitboudad]

but when you pass formStatus.disabled=true it disables the form, which means it has been interpreted by Formly, which is not implied neither by the type definition nor the documentation.

Not true, in order to disable the form you should use formStatus.disabled inside field expression.
If you think the doc should be adjusted, could you please send a PR 🙏 ?