React · SwiftUI · agent guides
Switch
A setting that is on or off and takes effect at once: a sunk pill track with a raised thumb that slides on the part spring; on, the track fills soft green.
Use it for
- Settings that apply immediately: "Sync this canvas", "Share usage data", "Show the grid".
Don't use it for
- A choice that needs Save (use a checkbox in a form), one of several options (use a segmented control), or a task (use the checkbox in the margin).