Method sub

pkg/lib/cockpit/dialog.tsx:761–776

(tag: K, update_func?: ((val: T[K]) => void) | undefined)

    }

    sub<K extends keyof T>(tag: K, update_func?: ((val: T[K]) => void) | undefined): DialogField<T[K]> {
        return new DialogField<T[K]>(
            this.#dialog,
            () => this.get()[tag],
            (val) => {
                const container = this.get();
                if (Array.isArray(container) && typeof tag == "number")
                    this.#setter(toSpliced(container, tag, 1, val) as T);
                else
                    this.#setter({ ...container, [tag]: val });
                if (update_func)
                    update_func(val);
            },
            this.#path ? this.#path + "." + String(tag) : String(tag)
        );
    }

    at<TT extends T>(witness: TT): DialogField<TT> {
        cockpit.assert(Object.is(witness, this.get()));