# Block a cid (hide a comment)

```jsx
const { blocked, unblock, block } = useBlock({ cid: "Qm..." });

if (blocked) {
  console.log(`'${cid}' is blocked`);
} else {
  console.log(`'${cid}' is not blocked`);
}

// to block
block();

// to unblock
unblock();
```