Formats a known nonnegative duration using whole seconds and minutes.
Durations below one second are shown as <1s; missing, nonfinite, and
negative durations remain unknown.
API
export declare function formatDuration(
milliseconds: number | undefined,
): string | undefined;formatDuration
string | undefined@parammilliseconds:number | undefinedThe elapsed duration in milliseconds.
@returnsstring | undefined