Mobx forms

mobx-forms.ts

type InType<T> = {
    readonly [P in keyof T]: T[P] | FormValue<any, T[P]>;
};

export class FieldsGroupState<T> {
    private fields: InType<T>;

    constructor(fields: InType<T>) {
        this.fields = fields;
    }
    
    @computed get model(): T | Error {
        const modelOut = {};

        for (const [key, item] of Object.entries(this.fields)) {
            if (item instanceof FormValue) {
                const value = item.valueModel;
                if (value instanceof Error) {
                    return value;
                }

                //@ts-ignore
                modelOut[key] = value;
            } else {
                //@ts-ignore
                modelOut[key] = item;
            }
        }

        //@ts-ignore
        return modelOut;
    }
}