react-use/stories/useBeforeUnload.story.tsx

import { storiesOf } from '@storybook/react';
import React, { useCallback } from 'react';
import { useBeforeUnload, useToggle } from '../src';
import ShowDocs from './util/ShowDocs';

const DemoBool = () => {
  const [dirty, toggleDirty] = useToggle(false);
  useBeforeUnload(dirty, 'You have unsaved changes, are you sure?');

  return (
    <div>
      {dirty && <p>Try to reload or close tab</p>}
      <button onClick={() => toggleDirty()}>{dirty ? 'Disable' : 'Enable'}</button>
    </div>
  );
};

const DemoFunc = () => {
  const [dirty, toggleDirty] = useToggle(false);
  const dirtyFn = useCallback(() => {
    return dirty;
  }, [dirty]);
  useBeforeUnload(dirtyFn, 'You have unsaved changes, are you sure?');

  return (
    <div>
      {dirty && <p>Try to reload or close tab</p>}
      <button onClick={() => toggleDirty()}>{dirty ? 'Disable' : 'Enable'}</button>
    </div>
  );
};

storiesOf('Side effects/useBeforeUnload', module)
  .add('Docs', () => <ShowDocs md={require('../docs/useBeforeUnload.md')} />)
  .add('Demo (boolean)', () => <DemoBool />)
  .add('Demo (function)', () => <DemoFunc />);