Toggle

func Toggle(arg any) *viewNode
 
func (n *viewNode) Label(label string) *viewNode
func (n *viewNode) OnChange(fn func(bool)) *viewNode

Toggle accepts either a *StateValue[bool] for reactive binding or a plain bool for transient (read-only) rendering.

State-driven

darkMode := gova.State(s, false)
 
gova.Toggle(darkMode).Label("Dark Mode")

Toggling writes through to the state and triggers a re-render.

Plain boolean inside a list row

List rows often reconstruct on every update, so you usually bind the toggle to the row's current value and wire OnChange back to a model mutation:

gova.Toggle(todo.Done).OnChange(func(done bool) {
    model.Update(func(m Model) Model {
        return toggleTodo(m, todo.ID, done)
    })
})

Any argument that is neither *StateValue[bool] nor bool panics at construction time.