Submit button that shows a spinner, announces itself and refuses to fire twice while an async action is in flight. Set loading={true} for the duration of the request — form submit, save, sign-in, checkout, delete confirmation, "generate" in an AI app, or any handler that awaits fetch — and the button disables itself so a second click cannot send the request again; loadingText swaps the label for "Saving…" or "Charging card…" while it waits. Common asks it answers: "react button with loading spinner", "disable button while submitting", "prevent double submit", "async submit button", "pending state button shadcn", "button spinner while awaiting fetch", "form submit loading state". Official shadcn/ui has no loading state anywhere in this path: its button ships no loading, pending or busy prop, and its spinner is a bare spinning icon with an aria-label — pairing them, disabling the button, and keeping the two in step is left to you, and doing it by hand is where the double-submit bug comes from. This one carries aria-busy while pending, and the spinner it composes is pulld's, which puts the label in a polite live region rather than only on the icon, so the wait is announced instead of being a silent frozen button. Two things worth knowing before you drop it in a form: it defaults to type="button", so pass type="submit" explicitly when it submits a form, and disabling a focused button takes it out of the tab order — the live region is what carries the state to a screen reader once focus has moved. The spinner atom installs with it through registryDependencies; there is nothing else to add.