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export class PreviewTracker<T> {
private snapshot: T | null = null;
begin({ state }: { state: T }): void {
if (this.snapshot === null) {
this.snapshot = structuredClone(state);
}
}
isActive(): boolean {
return this.snapshot !== null;
}
getSnapshot(): T | null {
return this.snapshot;
}
end(): T | null {
const snapshot = this.snapshot;
this.snapshot = null;
return snapshot;
}
}
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