Function useBlocker

useBlocker(): [
    isBlocked: boolean,
    block: () => Promise<void>,
    unblock: () => void,
]
Block an async flow and unblock it from an external context.

Returns [isBlocked: boolean, block: () => Promise<void>, unblock: () => void]
useBlocker<T>(): [
    isBlocked: boolean,
    block: () => Promise<T>,
    unblock: (result: T) => void,
]
Block an async flow and unblock it from an external context.
Type Parameters
- T
  The type of value that can be passed to unblock to resolve the Promise returned by block.
Returns [isBlocked: boolean, block: () => Promise<T>, unblock: (result: T) => void]
Example
```
const [isBlocked, block, unblock] = useBlocker<string>();

useEffect(() => {
  // Returns a Promise that is resolved with the value passed to unblock(value)
  block(); // → Promise<string>

  // Unblocks the blocker with given value
  unblock('Hello');
}, []);
```