Method update

packages/lit-form/src/tanstack-form-controller.ts:460–476

(
    _: ElementPart,
    [form, fieldConfig, _render]: Parameters<this['render']>,
  )

  }

  update(
    _: ElementPart,
    [form, fieldConfig, _render]: Parameters<this['render']>,
  ) {
    if (!this.#registered) {
      if (!this.#field) {
        const options = { ...fieldConfig, form }

        this.#field = new FieldApi(options)
        this.#unmount = this.#field.mount()
      }

      this.#registered = true
    }

    return this.render(form, fieldConfig, _render)
  }

  protected disconnected() {
    super.disconnected()