React useTitle hook

React, Hooks, Effect · Sep 27, 2021

Sets the title of the page

  • Use typeof to determine if the Document is defined or not.
  • Use the useRef() hook to store the original title of the Document, if defined.
  • Use the useEffect() hook to set Document.title to the passed value when the component mounts and clean up when unmounting.
const useTitle = title => {
  const documentDefined = typeof document !== 'undefined';
  const originalTitle = React.useRef(documentDefined ? document.title : null);

  React.useEffect(() => {
    if (!documentDefined) return;

    if (document.title !== title) document.title = title;

    return () => {
      document.title = originalTitle.current;
    };
  }, []);
};
const Alert = () => {
  useTitle('Alert');
  return <p>Alert! Title has changed</p>;
};

const MyApp = () => {
  const [alertOpen, setAlertOpen] = React.useState(false);

  return (
    <>
      <button onClick={() => setAlertOpen(!alertOpen)}>Toggle alert</button>
      {alertOpen && <Alert />}
    </>
  );
};

ReactDOM.render(<MyApp />, document.getElementById('root'));

Written by Angelos Chalaris

I'm Angelos Chalaris, a JavaScript software engineer, based in Athens, Greece. The best snippets from my coding adventures are published here to help others learn to code.

If you want to keep in touch, follow me on GitHub or Twitter.

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