The random string generator is selecting a unique string for both the server and client side

I am facing an issue with a component in Next.js (v14.2.1) where I need to display a random string while fetching data. Despite my attempts, I can't seem to maintain the same string on both server and client sides.

Below is the code snippet I am currently using:

const RandomLoadingText = () => {
  const possibleLoadingTexts = [
    "Asking Chat-GPT for a quote...",
    "Not loading...",
    "Tickling the Servers for Answers...",
    "Convincing the Hamsters to Run Faster...",
    "Summoning digital elves to fetch a witty quote...",
  ];

  const getRandomLoadingText = () => {
    const randomIndex = Math.floor(Math.random() * possibleLoadingTexts.length);
    return possibleLoadingTexts[randomIndex] as never;
  };

  const [loadingText] = useState(getRandomLoadingText)

  return (
    <div>
      <span className={`${lobster.className} text-lg`}>"</span>
      {loadingText}
      <span className={`${lobster.className} text-lg`}>"</span>
    </div>
  );
};

export default RandomLoadingText;

Despite attempting to choose a random string from an array for display during data fetching, I'm encountering issues where the string differs between Server-Side Rendering (SSR) and Client-Side Rendering (CSR), resulting in hydration errors.

Answer №1

There are 2 possible solutions to address this issue:

  1. Create a random index using RSC and transmit it to the client component through props.
  2. Implement useEffect and setState in the initialization phase only. The initial state could be an empty string.

Answer №2

It appears that there may be an issue with the useState hook in your code. Instead of

const [loadingText] = useState(getRandomLoadingText)
, it should be written as
const [loadingText, setLoadingText] = useState()
.

I recommend incorporating useEffect and utilizing setLoadingText when fetching data to ensure proper functionality.

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